Car shudders/dies when slowing down...
#1
Junior Member
Thread Starter
Join Date: Jan 2007
Location: West Valley City, Utah
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
Car: 2002 Pontiac Firebird (R.I.P 1992)
Engine: 3.8L Ram Air V6 3800 Series
Transmission: 5spd
Axle/Gears: Unsure
Car shudders/dies when slowing down...
My car seems to have an issue... The first time I start it each day it seems to start fine, once it's warmed up the idle stays around 750 like it shoud. Once I drop it in gear though it will run fine untill I try and slow down, say for a stop light or speed bump w/e, the RPM will drop below 500. Sometimes it will jump back up and stay running, but its pretty rough. Other times it will just die.
Also, sometimes when I start it, it will barely make idle, kind of a sluggish start. Or it will jump to about 1500 RPM without me even touching the gas, then go down to the 750 idle. Not sure what to think here, because it also shifts pretty hard for an auto. Sometimes it will go from 1-2 or 2-3 too soon it seems because I'll lose power. HOWEVER if I throw it in neutral before I slow down it wont do this.
So basically it shifts hard, lost some power, and tries to die on me alot. Oil changed not too long ago, and a new battery. Had the fuel system cleaned out and had it re-timed not too long ago as well.
Any ideas? Mass airflow center or the computer perhaps?
Thanks in advance.
Also, sometimes when I start it, it will barely make idle, kind of a sluggish start. Or it will jump to about 1500 RPM without me even touching the gas, then go down to the 750 idle. Not sure what to think here, because it also shifts pretty hard for an auto. Sometimes it will go from 1-2 or 2-3 too soon it seems because I'll lose power. HOWEVER if I throw it in neutral before I slow down it wont do this.
So basically it shifts hard, lost some power, and tries to die on me alot. Oil changed not too long ago, and a new battery. Had the fuel system cleaned out and had it re-timed not too long ago as well.
Any ideas? Mass airflow center or the computer perhaps?
Thanks in advance.
Last edited by Dima; 02-29-2008 at 11:54 AM. Reason: spelling
#2
Senior Member
Join Date: Jan 2008
Location: peterborough UK
Posts: 917
Likes: 0
Received 1 Like
on
1 Post
Car: 88 T firebird
Engine: 2.8
Transmission: t5
Re: Car shudders/dies when slowing down...
ok i know ive said this to alot of people now, but its just my experience - i had this exact problem, checked everything for months and couldnt find it, had iac apart 50 times ect ect in the end? inproper gapped plugs. solved everything!! start with the basics first never asume the worst!
#3
Junior Member
Thread Starter
Join Date: Jan 2007
Location: West Valley City, Utah
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
Car: 2002 Pontiac Firebird (R.I.P 1992)
Engine: 3.8L Ram Air V6 3800 Series
Transmission: 5spd
Axle/Gears: Unsure
Re: Car shudders/dies when slowing down...
I actually took it to a dealer and they said the computer was definately bad in it. Said it could cause alot of different symptoms. They quoted me about $320 to fix it so I might just do it and if it dont work I'll run another test or two, and if its too expensive I guess Im just goin to sell the ol' bird :l
I guess these types of cars arent for people who cant work on them by themselves.
I guess these types of cars arent for people who cant work on them by themselves.
Thread
Thread Starter
Forum
Replies
Last Post