cold stall and idle hunting

devilishdave
0

Asked by Oct 13, 2008 at 12:56 PM about the 1985 Chevrolet Corvette

Question type: Maintenance & Repair

i have a cold stall or hunting idle problem on a 1985 corvette (only cold)runs great when hot all the injectors have been replaced 8 months ago
any ideas?

8 Answers

Rob Owsianyk
225

try cleaning the iac

Deven Prater
95

For the idle hunting problem try the Throttle Positioning Sensor.

Rob Owsianyk
225

i really dont agree tps only tell computer where the throttle is the iac controls iddle cleaning the iac normally cures problem it still works if its searching for iddle

ncChris
0

had the same problem on my 94.. replaced the egr and problem solved. If the egr was the culprit then u will most likely have to change the oxy sensors too. your problem was identical to mine. everything ran great till it warmed up.

Michael McGrail
7,925

Given this occurs in COLD weather, I would have to agree with the gentleman that mentioned the Idle/Air Control (IAC) Valve. It would produce your symptoms, although I do not recommend cleaning it, nor does the manufacturer. I am fairly certain replacing the IAC would solve your problem. EGR would not effect the engine until it warms up, and the TPS sensor only relays the position of the throttle and would not cause idle hunting. Keep in mind though, depending on which TPI setup you have, it may be equipped with a cold start injector and it would produce similar symptoms if that injector is bad.

Glen Gorringe
45

Vacuum leak.

Steve7seven
20

I own a 94 and it only hunts when its warm. We changed the ecm, checked for vacumn leaks, bypassed the egr to see if anything can stop the problem. We made sure the IAC was clean and working porperly. Something is telling it to surge to 150 after it heats up. The shop has been working on this for over three weeks. We are now checking to see if the o2 sensors are bad even tho they are reading that they are fine. Any feedback??

Steve7seven
20

I own a 94 and it only hunts when its warm. We changed the ecm, checked for vacumn leaks, bypassed the egr to see if anything can stop the problem. We made sure the IAC was clean and working porperly. Something is telling it to surge to 150 after it heats up. The shop has been working on this for over three weeks. We are now checking to see if the o2 sensors are bad even tho they are reading that they are fine. Any feedback??

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

Corvette
Looking for a Used Corvette in your area?
CarGurus has 16,552 nationwide Corvette listings starting at $4,399.
ZIP:

Search Chevrolet Corvette Questions

Chevrolet Corvette Experts

#1 califcarson
califcarson
Reputation 1,450
#2 carGrrl
carGrrl
Reputation 1,160
#3 Tom Demyan
Tom Demyan
Reputation 960
View All

Related Models For Sale

Used Chevrolet Camaro"
274 Great Deals out of 26,401 listings starting at $1,900
Used Ford Mustang"
284 Great Deals out of 47,173 listings starting at $1,100
Used Porsche 911"
133 Great Deals out of 4,813 listings starting at $12,990
Used Dodge Charger"
415 Great Deals out of 33,371 listings starting at $2,500
Used BMW M3"
44 Great Deals out of 1,354 listings starting at $4,300
Used Ford F-150"
2,580 Great Deals out of 198,608 listings starting at $1,500
Used Mercedes-Benz SL-Class"
115 Great Deals out of 3,827 listings starting at $4,795

Used Cars For Sale

2016 Chevrolet Corvette For Sale
7,170 listings starting at $53,881
2015 Chevrolet Corvette For Sale
35 Great Deals out of 1,259 listings starting at $47,980
2014 Chevrolet Corvette For Sale
21 Great Deals out of 922 listings starting at $44,887
2013 Chevrolet Corvette For Sale
15 Great Deals out of 428 listings starting at $28,877
2012 Chevrolet Corvette For Sale
9 Great Deals out of 351 listings starting at $26,995