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Missfire hard start by Turrent
Started on: 09-04-2013 06:31 PM
Replies: 11 (120 views)
Last post by: Turrent on 09-07-2013 01:48 PM
Turrent
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Report this Post09-04-2013 06:31 PM Click Here to See the Profile for TurrentClick Here to Email TurrentSend a Private Message to TurrentEdit/Delete MessageReply w/QuoteDirect Link to This Post
Recently the car has been having an ocational missfire and smells a bit rich. In the mornings i'll start the car run for about a min or two then die start it once or twice more and it stays on. Once hot if i put a load on the engine either lights or the heater fan kicks in at idle at a stop she starts seeming to be struggling to stay idling well. Any sugestions or routes of checking? I planed on doing plugs and wires on it soon. But wondering if it needs more then that.
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Turrent
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Report this Post09-04-2013 06:34 PM Click Here to See the Profile for TurrentClick Here to Email TurrentSend a Private Message to TurrentEdit/Delete MessageReply w/QuoteDirect Link to This Post

Turrent

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Forgot to mention 2.8 L v6 1986 se
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Gall757
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Report this Post09-04-2013 07:39 PM Click Here to See the Profile for Gall757Send a Private Message to Gall757Edit/Delete MessageReply w/QuoteDirect Link to This Post
Bad grounds. Remove the Pos and Neg battery cables and clean both ends. That will probably do it, but here is the next step if needed.

http://www.fiero.nl/forum/Forum2/HTML/043240.html

[This message has been edited by Gall757 (edited 09-04-2013).]

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benoitmalenfant
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Report this Post09-04-2013 08:10 PM Click Here to See the Profile for benoitmalenfantSend a Private Message to benoitmalenfantEdit/Delete MessageReply w/QuoteDirect Link to This Post
Some of your symptoms sound like and EGR valve issue to me.

Is the 'Service Engine Soon' light on ? If so, I'd check for codes as well, they're good indicators of what's going on.

You can check the EGR valve's passages for build-up and clean them with a wire-wheel. Only thing is, you'll most likely need a new gasket to screw it back on.

Your symptoms like 'dies when cold', 'rough idle' suggest a probable 'always open' EGR.

[EDIT]: As Gall stated always a good idea to check grounds and add at least 1 good one. This solves a lot of weird issues and is pretty cheap to do.

[This message has been edited by benoitmalenfant (edited 09-04-2013).]

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Turrent
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Report this Post09-04-2013 08:38 PM Click Here to See the Profile for TurrentClick Here to Email TurrentSend a Private Message to TurrentEdit/Delete MessageReply w/QuoteDirect Link to This Post
@benoitmalenfant yeah it comes on and off randomly
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Bloozberry
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Report this Post09-04-2013 09:31 PM Click Here to See the Profile for BloozberrySend a Private Message to BloozberryEdit/Delete MessageReply w/QuoteDirect Link to This Post
Most misfire issues are related to old plug wires, improperly gapped plugs, or a cracked, worn, or corroded distributor cap.

If you have a multimeter, your plug wires shouldn't measure more than 10K ohms per foot of wire... so no more than 20K - 30K ohms end to end. If you don't have a meter, then simply spray some water (mist) over the wires while the engine is running at night and watch to see if there are blue sparks jumping from the wires to the block or other metal. If so, that's a sign the plugs gaps are too large or the wires are too old.

If you don't get sparks, then remove your distributor cap and have a look at the posts inside... they may be covered in white or green powder. Clean them off and that should solve most of your problem.

(Edit spelling... turns out there's no such thing as a mullet-meter)

[This message has been edited by Bloozberry (edited 09-04-2013).]

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Turrent
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Report this Post09-04-2013 09:36 PM Click Here to See the Profile for TurrentClick Here to Email TurrentSend a Private Message to TurrentEdit/Delete MessageReply w/QuoteDirect Link to This Post
@bloozberry thanks as always. But to note i pulled codes got 12 13 21 and 44 not sure if some of that is from checking with no running engine but might be time for a few parts
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Turrent
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Report this Post09-04-2013 09:40 PM Click Here to See the Profile for TurrentClick Here to Email TurrentSend a Private Message to TurrentEdit/Delete MessageReply w/QuoteDirect Link to This Post

Turrent

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I also forgot to mention my car currently standing its getting like 12.5 average mpg i know its a car from the 80s but its rated at 22 average
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Bloozberry
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Report this Post09-04-2013 10:30 PM Click Here to See the Profile for BloozberrySend a Private Message to BloozberryEdit/Delete MessageReply w/QuoteDirect Link to This Post
Well, with code 13, your O2 sensor isn't working so you're running in open loop all the time and it's no wonder you're getting poor fuel economy. Code 21 means your TPS isn't working, which is a major sensory input device for the ECM to calculate the amount of fuel to spray, and Code 44 is probably just a reaction to the TPS not working. (Code 12 just means your ECM is working fine). Certainly start with the known problems before trying anything else.
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Turrent
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Report this Post09-05-2013 07:24 PM Click Here to See the Profile for TurrentClick Here to Email TurrentSend a Private Message to TurrentEdit/Delete MessageReply w/QuoteDirect Link to This Post
@bloozberry alright tomorrow get paid so starting with plugs wires and the O2 sensor possible the tps sensor. If i've got enough going to check the timing of the distributor as well.
Other then that noting i actually had a stall even hot. But as i checked today codes are consistent 12 13 21 44
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Turrent
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Report this Post09-07-2013 11:14 AM Click Here to See the Profile for TurrentClick Here to Email TurrentSend a Private Message to TurrentEdit/Delete MessageReply w/QuoteDirect Link to This Post
Well installed plugs wires o2 and tps sensor pulled the ecm fuse to reset the computer any other suggestions that I should do
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Turrent
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Report this Post09-07-2013 01:48 PM Click Here to See the Profile for TurrentClick Here to Email TurrentSend a Private Message to TurrentEdit/Delete MessageReply w/QuoteDirect Link to This Post
Alright after letting the emc fuse out for 30 mins or so. After a 10 min drive its a lot better but still has codes 12, 13, 22 (new one), and 44
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