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3.4 will not rev over 3000 rpm.... well most of the time by Sabenn_88_notch
Started on: 05-21-2014 09:09 AM
Replies: 10 (155 views)
Last post by: Sabenn_88_notch on 05-22-2014 06:10 PM
Sabenn_88_notch
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Report this Post05-21-2014 09:09 AM Click Here to See the Profile for Sabenn_88_notchClick Here to Email Sabenn_88_notchSend a Private Message to Sabenn_88_notchEdit/Delete MessageReply w/QuoteDirect Link to This Post
I have a good old head scratcher
My 3.4 will not rev over 3000 rpm when it is cold neither while reving it or while driving. (Its almost undrivable) then as it warms up it will rev over but rpms will slow between 3000 and 3500 and it still can't drive over 3000 and then when the engine has been ran for a while and is nice and hot it will eventually venture over the 3000 mark but will still have a slow point between 3000 and 35
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Sabenn_88_notch
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Report this Post05-21-2014 09:11 AM Click Here to See the Profile for Sabenn_88_notchClick Here to Email Sabenn_88_notchSend a Private Message to Sabenn_88_notchEdit/Delete MessageReply w/QuoteDirect Link to This Post

Sabenn_88_notch

38 posts
Member since Dec 2013
3500 rpm
Does anyone have any clue on what may be wrong? I drove it yesterday when it was warm and was working great, even after sitting for a few hours I took it out and it worked good with little hiccups. But when I let it sit overnight it didn't want to start and didn't want to run even more so..

Help!!!
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Gall757
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Report this Post05-21-2014 10:15 AM Click Here to See the Profile for Gall757Send a Private Message to Gall757Edit/Delete MessageReply w/QuoteDirect Link to This Post
This IS a strange one.....

Do you have black exhaust smoke when the engine is cold?
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phonedawgz
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Report this Post05-21-2014 10:37 AM Click Here to See the Profile for phonedawgzClick Here to visit phonedawgz's HomePageClick Here to Email phonedawgzSend a Private Message to phonedawgzEdit/Delete MessageReply w/QuoteDirect Link to This Post
Hows your fuel pressure?
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Sabenn_88_notch
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Report this Post05-21-2014 11:31 AM Click Here to See the Profile for Sabenn_88_notchClick Here to Email Sabenn_88_notchSend a Private Message to Sabenn_88_notchEdit/Delete MessageReply w/QuoteDirect Link to This Post
I currently have a fuel pump for a 2.5 which has significantly less psi than that of the 3.4. That is my next step is getting a new pump.
But I don't think that is the problem right now because when I try to get the car to run it will backfire a couple of tines. So there is fuel but I think it is a bad sensor. I'm doing the fuel pump this weekend. If it is. Sensor which one could it be?
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Patrick
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Report this Post05-21-2014 11:48 AM Click Here to See the Profile for PatrickClick Here to Email PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Sabenn_88_notch:

I currently have a fuel pump for a 2.5 which has significantly less psi than that of the 3.4.

But I don't think that is the problem...


...

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hiwil88formula
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Report this Post05-21-2014 01:26 PM Click Here to See the Profile for hiwil88formulaClick Here to Email hiwil88formulaSend a Private Message to hiwil88formulaEdit/Delete MessageReply w/QuoteDirect Link to This Post
If you got a 4 cyl fuel pump on a V6, put the correct pump in before you throw any more parts at it. Your 3.4 needs 38-42 psi to operate properly. With the 4cyl pump you are prolly only putting out 10-14 psi. While you are in there you might as well fix your fuel level sender so the guage reads more correctly.

[This message has been edited by hiwil88formula (edited 05-21-2014).]

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Sabenn_88_notch
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Report this Post05-21-2014 01:34 PM Click Here to See the Profile for Sabenn_88_notchClick Here to Email Sabenn_88_notchSend a Private Message to Sabenn_88_notchEdit/Delete MessageReply w/QuoteDirect Link to This Post
how did you know my sensor wasn't reading right? mind reader...

fuel pump it is then!
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hiwil88formula
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Report this Post05-21-2014 01:41 PM Click Here to See the Profile for hiwil88formulaClick Here to Email hiwil88formulaSend a Private Message to hiwil88formulaEdit/Delete MessageReply w/QuoteDirect Link to This Post
http://www.fiero.nl/forum/Forum2/HTML/092117.html

That is the link for the fuel sender fix. I did mine about 6 months back its better, but not 100%.
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Gall757
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Report this Post05-21-2014 02:01 PM Click Here to See the Profile for Gall757Send a Private Message to Gall757Edit/Delete MessageReply w/QuoteDirect Link to This Post
i'm surprised the engine ran at all.
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Sabenn_88_notch
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Report this Post05-22-2014 06:10 PM Click Here to See the Profile for Sabenn_88_notchClick Here to Email Sabenn_88_notchSend a Private Message to Sabenn_88_notchEdit/Delete MessageReply w/QuoteDirect Link to This Post
UPDATE:

Fuel pump installed, car runs better than expected.

Thank you guys for all your input, I can call the project done.... for now!

thanks again!
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