car still won't idle

U2SLO450

Member

May 27, 2006

118

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16

Dec 15, 2006

#1

• Dec 15, 2006

• #1

i have an 87 t-top gt with all the bolt ons and recently it began stall at stop signs and now it wont even stay running if you dont feather the gas pedal, when you take off you can hear it popping under the hood (in the intake i guess) then it takes off and runs like it should but as soon as you slow to a stop it dies, I've already replaced the plugs, wires, rotor, coil, fuel filter, checked timing, IAC, mass air sensor, new throttle body and probably more things that i cant think of right now. Anyone have any new suggestions? Any input is appreciated.

 

H

Harleytwostar

New Member

Oct 10, 2006

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Dec 15, 2006

#2

• Dec 15, 2006

• #2

Vac leak? Does it idle at all without feathering the pedal? I mean like rough or just flat out dies? Guess it could be a really bad computer problem also but doubt it.

George

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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Dec 15, 2006

#3

• Dec 15, 2006

• #3

When the computers go south, there tends to often be massive system faults.

Yanking codes is always key - especially since you shouldn't have a functional CEL.

For a real quick test, grab your dizzy and see if it's bolted down tight. Or toss a timing light on and make sure the timing didnt self-retard from a loose hold-down.

Good luck.

 

U2SLO450

Member

May 27, 2006

118

0

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Dec 15, 2006

#4

• Dec 15, 2006

• #4

no, it won't idle at all unless you are on the gas pedal. Why would it be popping in the intake?

 

mykscholze

Member

Aug 13, 2003

35

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6

St. Louis, MO

Dec 15, 2006

#5

• Dec 15, 2006

• #5

Check your timing...

It will backfire through the intake if there is spark while the intake valves are open.

 

T

TENGRAM

New Member

Mar 18, 2006

143

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Dec 15, 2006

#6

• Dec 15, 2006

• #6

check timing, Check for Codes, remove your IAC and clean it out with carb cleaner.

backfiring through intake is usually is from running lean.

 

jrichker

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Mar 10, 2000

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Dublin GA

Dec 16, 2006

#7

• Dec 16, 2006

• #7

See "Help me create the Surging Idle Checklist" at http://forums.stangnet.com/showthread.php?t=534062
for help with your idle problems. The first post contains all the updates to the fixes. I continue to update it as more people post fixes or ask questions.

 

N

noslow1986

New Member

Mar 25, 2006

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oswego Il

Dec 16, 2006

#8

• Dec 16, 2006

• #8

i had the same problem back fire and no power at 4500 rpms fuel pump and bad egr valve was my problem