I just was checking out my idling speed for the first time and saw that it idles at about 1500rpms. I didn't know what the correct idling should be on the 2.8L. Is this too high or what? And if so what could be the problem or what do I need to do? Just was wondering. Thanks.

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1987 Canadian GT
5 Speed w/Sunroof

Sounds like an EGR tube leak or vacum tube leak. search the archives for more information, or check out "ogre's cave" which is linked to at the very top of every page on the forum.

The car drives fine, and when shifting it does just fine. I was just noticing it was about 1500rpms. Does not idle funny or anything just was around 1500rpm when I checked it out. So its either a vacuum leak or EGR? Hurting my perfomance at all you think?

I don't think it is hurting performance but I would venture to assume that your car is running very hot when it is idling for more than 5 mintures.

for what it's worth, i once left off my vacuum line on a v6, 1986, that goes along the firewall to the vacuum boost on the brakes. my car idled at about 1500 rpm and i couldn't hear it hiss like a normal vacuum leak since the hose is 1/2 inch and was too big of a leak to hiss

I had the same problem. I purchased my '88 GT back in May, and recently solved the problem. I had an EGR leak at the gasket on the EGR, I spent $150 on a new tube that required a new gasket. You can check it using a rubber hose as a listening tool. A new gasket brought the idle down to about 1200 rpm.

I then replaced the thermostat when I noticed the interior heat was lacking on a real cold zub zero day. Once I did that, the idle came down to about 900.

1500 is def too high, but not of real concern. Check the egr tube that runs from the intake to the egr valve...common problem. And check for leaks with some carb cleaner. Spray around anything that can leak vacuum. As a warning...do it on the engine before it gets super hot cause carb cleaner is flammable. If you hear the idle change, you've found your leak. Also, you might want to take your idle air control out of the throttle body...either held by 2 screws or it screws into the throttle body using a 1 1/4 wrench if memory serves and clean the iac with carb cleaner and take a rag and spray cleaner up in hole where iac came from, use rag and screwdriver to clean up in the hole.

Phil

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GTDude
25 years GM experience

definatly check the egr tube, that or the IAC valve, and thermostat. if you can just block the hole where the tube enters the plenum, lose the tube looks alot cleaner, no worries. i had the same problem but make that 1500 2500 that was after a GM dealer tune up. bastards. any how lose the tube. you'll be happy you did

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blue 87gt, loaded, mr mikes interior, no cat K&N, hight compression rebuild, new cam and trw forged pistons, OZ f1 plus rims,[img]http://zorbaz.homestead.com/grandbeachpics.car8[img]

I had a problem with that when I bought my car and then after swapping in and out 2 different engines had the same problem. After changing the IAC valve my rpm's dropped to normal range. So my guess would be your IAC is acting up and needs replaced.

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White 85 SE conversion to 86+ GT w/2.8 and a 4:10 tranny

My 87 GT is ideling between 1000 and 1400 RPM. It varies. I have seen this with other
fieros as well and I believe this is normal (not 100% sure).

ideling at 1500 rpm is a little bit to high I think.

950 - 1,000 stick cars & 850 for autos
FD

What the!??!

My 86Gt is idling in the cold at a little over 2000RPMs. AND I just got a new EGR tube replaced by a specialized Fiero shop. What should I do??

I went ot race tech to for that and well I have an idle of 2000 as well. I have replaced all the vacuum lines to ss, New alternator, change every damn sensor, and still this problem I kind jhave given up on it. My car I also figure out runs rich. Because it gargles at low rpm when I am down shifting.

quote Originally posted by Club281: What the!??! My 86Gt is idling in the cold at a little over 2000RPMs. AND I just got a new EGR tube replaced by a specialized Fiero shop. What should I do??

If all else fails, check the timing. If the timing is off it can cause a higher than normal idle.

Your idle should not be more than 1000 RPM when warmed up.....period. If it is, then you have a problem somewhere.

It is, however, perfectly normal to have a high idle on a super cold morning, but after the engine warms up it should drop back to normal levels.

Well I do have a low temp thermostat, and yes i did get the timing fixed.

quote Originally posted by mrfiero: If all else fails, check the timing. If the timing is off it can cause a higher than normal idle. Your idle should not be more than 1000 RPM when warmed up.....period. If it is, then you have a problem somewhere. It is, however, perfectly normal to have a high idle on a super cold morning, but after the engine warms up it should drop back to normal levels.