Idle PROBLEMS + stalling
Thread Starter
Senior Member
Joined: Oct 1999
Posts: 548
Likes: 0
From: Dallas, Texas
Car: 1991 Z28
Engine: 5.3 Gen III SBC
Transmission: 4L80E NTC 258mm Stall
Axle/Gears: Trick Chassis 9" 3.50 S-Strac
Idle PROBLEMS + stalling
Ok I am baffled at idle the car is like a roller coaster. the idle goes up and down drastically somtimes enough to stall the car + when crusing in a gear and I am geting ready to stop I put it in neutral and it falls on its face about 50% of the time. This is getting VERY embrassing and i need to get it fixed I have pretty much rounded it down to the IAC motor (i dont think so becuase the idle is screwed even when I unplug it) TPS sensor, MAP sensor, or ignition module. and how do I test them??
Thanks for the help.
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91 Z28 5.7l Camaro
T-56,McLeod Street Clutch, Cross Drilled Brakes, KYB's,AFPR, 3.73 Gears, Borla Adjustable Cat Back, Hypertech Chip, Hooker Headers.
more to come....
My 91 Z28
Thanks for the help.
------------------
91 Z28 5.7l Camaro
T-56,McLeod Street Clutch, Cross Drilled Brakes, KYB's,AFPR, 3.73 Gears, Borla Adjustable Cat Back, Hypertech Chip, Hooker Headers.
more to come....
My 91 Z28
Senior Member
Joined: Mar 2001
Posts: 875
Likes: 0
From: Scranton, PA/North Brunswick, NJ
Car: 1986 Pontiac Trans Am
Engine: 5.0 TPI
Transmission: 700R4
You are on the right track....i am having the same exact symptoms....unfortunetly, i do not know how to test them, but i wanted to tell you to not rule out the EGR valve. Thats the first thing i will be looking at in the comming weeks, along with everything else you mentioned...good luck, and post what you find.
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1986 WS6-Equipped 5.0 TPI Trans Am
Random Tech High-Flow Cat
Two Chamber Flowmaster Muffler
Megs Custom 4.5" Stainless Steel Rolled Tips
1999 Grand Am GT In-Dash CD Player w/Equalizer(fits like '86 original)
5% Tint On Rear, 35% On Sides
http://www.pitt.edu/~zyhst/trans86/
OTHER RIDE:
1998 C5 6Spd. Corvette Coupe
Silver w/Gray Leather Int.
12/14 Options
Stock(for now)
Best 1/4th: 13.5 @ 104.4MPH
------------------
1986 WS6-Equipped 5.0 TPI Trans Am
Random Tech High-Flow Cat
Two Chamber Flowmaster Muffler
Megs Custom 4.5" Stainless Steel Rolled Tips
1999 Grand Am GT In-Dash CD Player w/Equalizer(fits like '86 original)
5% Tint On Rear, 35% On Sides
http://www.pitt.edu/~zyhst/trans86/
OTHER RIDE:
1998 C5 6Spd. Corvette Coupe
Silver w/Gray Leather Int.
12/14 Options
Stock(for now)
Best 1/4th: 13.5 @ 104.4MPH
Junior Member
Joined: Feb 2001
Posts: 48
Likes: 0
From: sykesville, md u.s.a.
are you getting any ses codes?
check the faq or tech articles on how to test tps sensor
pull out the ignition module from the distributor and get it tested at local parts store
not sure how to test map sensor since i have maf
egr valve stuck open could hurt it, but i doubt that is it
check the faq or tech articles on how to test tps sensor
pull out the ignition module from the distributor and get it tested at local parts store
not sure how to test map sensor since i have maf
egr valve stuck open could hurt it, but i doubt that is it
Member
iTrader: (1)
Joined: Mar 2001
Posts: 113
Likes: 0
From: St.Pete, FL.
Car: 92 Camaro
Engine: 406 sbc
Transmission: T56
Axle/Gears: 9" ME with 4.56 gears
I had that prob and it was the o2 sensor. It had worked it's way out of the exaust and was just hanging there.This was on my truck that I stuck a TPI 350 in.
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www.geocities.com/camaro1j/myz28.html
406
accel supper ram
6000 rpm Hyd roller cam
afr heads
spohn torque arm and crossmember
t-56 trans, [wier racing bellhousing and hydrolic throwout bearing]
9" ME rearend 3.91 Gears
------------------
www.geocities.com/camaro1j/myz28.html
406
accel supper ram
6000 rpm Hyd roller cam
afr heads
spohn torque arm and crossmember
t-56 trans, [wier racing bellhousing and hydrolic throwout bearing]
9" ME rearend 3.91 Gears
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