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Need help, fuel issue and othe questions. by Squishyxout
Started on: 09-11-2014 08:18 PM
Replies: 23 (267 views)
Last post by: tshark on 09-15-2014 07:01 PM
Squishyxout
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Report this Post09-11-2014 08:18 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post
Alright Fiero Fanatics, I need your help. I have a 1986 Fiero SE with an Iron Duke (2.5l 4cyl) and an auto trans.

I got this for free, and I've been working on it almost every day since. I have started with trying to see all of the obvious problems. So I've replaced the plugs and wires, the fuel pump, and the fuel filter. The oil looked like new, and the tranny fliud was perfect. I wasn't getting flow with the coolant system so I replaced the Water pump.

Turns out, Fieros are weird, I didn't need to change the water pump, it was just fine. Fieros have to be "burped" which is pretty easy to do, But I didn't know about it when I got the car (first Fiero btw)

Coolant issue is fixed, getting flow now, but I've got a leak that I can't locate. I'll get back to that later, My big issue right now is that I only get fuel sometimes. I can get fuel, get it started and it will run until it runs out of juice or I give it too much gas. I know for a fact I need to replace the Alternator, and I will be doing so with this paycheck (hopefully someone can either explain to me how or point me in the right direction). I just need this up and running well enough to drive it 5 miles a day, until I can afford the setup I've been looking at.

I don't have any pictures of the work I've done yet, but I have pictures of the car and engine bay
If you wanna see em let me know.
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Squishyxout
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Report this Post09-11-2014 08:31 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post
I guess I spaced off trying to post this,

I get fuel and I can get it to run, though it idles at about 2k. It will continue running until I drive it for about 5 minutes and then it usually dies.

Once it dies, I no longer get fuel, I thought it was the connection to the injector, so I jumped it and the connector is fine, I ended up buying an Injector too, and when I get fuel it's more evenly dispersed, but that wasn't the problem. it's as if once it dies, the pump doesn't work anymore.

I am at a loss as to what this could be. so I fall to asking for help.
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Alex.07.86GT
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Report this Post09-11-2014 11:29 PM Click Here to See the Profile for Alex.07.86GTSend a Private Message to Alex.07.86GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Squishyxout:

I guess I spaced off trying to post this,

I get fuel and I can get it to run, though it idles at about 2k. It will continue running until I drive it for about 5 minutes and then it usually dies.

Once it dies, I no longer get fuel, I thought it was the connection to the injector, so I jumped it and the connector is fine, I ended up buying an Injector too, and when I get fuel it's more evenly dispersed, but that wasn't the problem. it's as if once it dies, the pump doesn't work anymore.

I am at a loss as to what this could be. so I fall to asking for help.


have you checked the fuel pressure when you say you get no fuel? how much fuel pressure do you have?

#2 any engine codes?

#3 when you "get no fuel" is there spark at the coil?
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Squishyxout
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Report this Post09-12-2014 12:06 AM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post
I've had the line off and turned the key to the on position and it's like the pump isn't turning back on. and I /always/ have spark. I've checked spark when I don't have fuel as well as when I do. and I haven't had it running long enough to get it to someone to check the codes, but the "service engine soon" light is on.

Would the ECM tell it not to send fuel after it dies?
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Squishyxout
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Report this Post09-12-2014 07:46 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post
Just going to throw it out there for anyone having similar issues. It has occurred to me that it could very well be the Fuel Pump Relay. If it fixes the given problem, I'm going to be posting to let you guys know.
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Squishyxout
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Report this Post09-12-2014 09:56 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post
The fuel pump relay didn't change anything, next thing on the list is the ignition control module. will be trying this tomorrow.
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tebailey
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Report this Post09-12-2014 10:10 PM Click Here to See the Profile for tebaileyClick Here to Email tebaileySend a Private Message to tebaileyEdit/Delete MessageReply w/QuoteDirect Link to This Post
Have you tried jumping the oil pressure switch? You may be loosing oil pressure when it gets hot. With the cooling issue when you first got the car I would question over heating damage.
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Squishyxout
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Report this Post09-12-2014 11:11 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post
I've got proper oil pressure, I have a blockage in the Cat so I have too much back pressure as well as a vacuum leak, I know why it dies, I just cant seem to find why the fuel pump won't turn back on once it dies. Would the oil pressure sensor prevent the fuel pump from priming the lines when you turn the ignition on?
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tshark
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Report this Post09-13-2014 09:33 AM Click Here to See the Profile for tsharkSend a Private Message to tsharkEdit/Delete MessageReply w/QuoteDirect Link to This Post
...

[This message has been edited by tshark (edited 09-08-2018).]

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Csjag
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Report this Post09-13-2014 10:58 AM Click Here to See the Profile for CsjagClick Here to Email CsjagSend a Private Message to CsjagEdit/Delete MessageReply w/QuoteDirect Link to This Post
I had a similar problem when my fuel pump was failing but I would not keep driving it with a plugged cat.
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Squishyxout
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Report this Post09-13-2014 12:42 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Csjag:

I had a similar problem when my fuel pump was failing but I would not keep driving it with a plugged cat.


I have only had it running for less than an hour, I just need to get it running long enough that I can get it across town to my friend's garage and we can bypass the Cat. I'm beginning to think that the Fuel Pump that I put in is not a good one.
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Squishyxout
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Report this Post09-13-2014 12:44 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post

Squishyxout

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quote
Originally posted by tshark:

As for the fuel pressure issue, are you testing as the schraeder (sp) valve? We need to find out where the fuel pressure issue is.


When I've checked for pressure in the lines, I unscrewed it from the inlet on the fuel filter. it doesn't even squirt the tiniest bit of fuel out of the line.
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jsmorter
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Report this Post09-13-2014 01:25 PM Click Here to See the Profile for jsmorterClick Here to Email jsmorterSend a Private Message to jsmorterEdit/Delete MessageReply w/QuoteDirect Link to This Post
what brand fuel pump did you buy?
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Squishyxout
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Report this Post09-13-2014 02:27 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post
I bought it from the store, but this is the one I bought.
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Csjag
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Report this Post09-13-2014 02:34 PM Click Here to See the Profile for CsjagClick Here to Email CsjagSend a Private Message to CsjagEdit/Delete MessageReply w/QuoteDirect Link to This Post
I wouldn't use anything but Bosch or AC/Delco. Be sure the fuel pump is wired correctly, I had to drop my tank twice because I hooked positive to negative and it caused the pump to run backwards and pump the fuel right back into the tank.
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Alex.07.86GT
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Report this Post09-13-2014 09:33 PM Click Here to See the Profile for Alex.07.86GTSend a Private Message to Alex.07.86GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Squishyxout:

I've had the line off and turned the key to the on position and it's like the pump isn't turning back on. and I /always/ have spark. I've checked spark when I don't have fuel as well as when I do. and I haven't had it running long enough to get it to someone to check the codes, but the "service engine soon" light is on.

Would the ECM tell it not to send fuel after it dies?


**You dont need the engine running to retrieve the codes so retrieve the codes!

Make sure your battery is fully charged and stays charged!

how to test fp
how to check your fuel pressure problem

[This message has been edited by Alex.07.86GT (edited 09-13-2014).]

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Squishyxout
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Report this Post09-13-2014 09:37 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post
The only ones I can get are these but I was talking to a couple mechanics and they said to go with the Delphi one or order it from summit.

I also know that I have it wired right, but I have Butt connectors in the fuel tank because the hookups were too big for the new fuel pump.

I'm going to buy a new fuel pump and replace the wires, any suggestions on what pump and how to replace the wires?
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Squishyxout
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Report this Post09-13-2014 09:40 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post

Squishyxout

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Member since Sep 2014
Also, I checked the engine codes today, 12 and 34, which means the map sensor isn't getting enough power (makes sense because I didn't have it plugged in) and the vacuum diagram shows the TB connecting to the map sensor, but the map sensor vacuum line is connected directly to the air cleaner. I'll upload a photo when I have light tomorrow.
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Alex.07.86GT
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Report this Post09-13-2014 09:49 PM Click Here to See the Profile for Alex.07.86GTSend a Private Message to Alex.07.86GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Squishyxout:

The only ones I can get are these but I was talking to a couple mechanics and they said to go with the Delphi one or order it from summit.

I also know that I have it wired right, but I have Butt connectors in the fuel tank because the hookups were too big for the new fuel pump.

I'm going to buy a new fuel pump and replace the wires, any suggestions on what pump and how to replace the wires?


I recommend you get your new pump wired up correctly and use what you have as long as it is good!

You can test the pump before you move the tank back up.

[This message has been edited by Alex.07.86GT (edited 09-13-2014).]

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Squishyxout
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Report this Post09-13-2014 11:36 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post
It's wired correctly (as far as placement on where the wires go) but it's the butt connectors I'm concerned about. I will post a few pictures of the problems I've talked about tomorrow, either way I'm actually going to be getting the better pump. because it's an $18 difference.

I'm also considering using a toggle switch on the fuel pump if this doesn't fix the problem.
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Squishyxout
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Report this Post09-14-2014 11:28 PM Click Here to See the Profile for SquishyxoutClick Here to Email SquishyxoutSend a Private Message to SquishyxoutEdit/Delete MessageReply w/QuoteDirect Link to This Post
Alright guys, I'm a little ignorant

I let my friend work on my car with me and we were a little drunk. He crimped down the wires and the power wire wasn't actually crimped onto the wire....

It's up and running guys!
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Alex.07.86GT
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Report this Post09-15-2014 12:11 AM Click Here to See the Profile for Alex.07.86GTSend a Private Message to Alex.07.86GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Squishyxout:

Alright guys, I'm a little ignorant

I let my friend work on my car with me and we were a little drunk. He crimped down the wires and the power wire wasn't actually crimped onto the wire....

It's up and running guys!


Crimp?? You need to solder those connections or it will only come back to haunt you!!!!
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Report this Post09-15-2014 02:23 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
"As for the fuel pressure issue, are you testing as the schraeder (sp) valve? We need to find out where the fuel pressure issue is." * a 2.5 Has NO Schrader valve. unless you Install one.
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Report this Post09-15-2014 07:01 PM Click Here to See the Profile for tsharkSend a Private Message to tsharkEdit/Delete MessageReply w/QuoteDirect Link to This Post
...

[This message has been edited by tshark (edited 09-08-2018).]

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