a90mustang

Hi I have a 90 GT wich is having the same problems as some others here with the irratic idle. I am going to replace the IAC tomorrow and see if that helps. </P>


The other problem I have is my 90 GT 5 speed will stall when putting in gear. I can hold clutch to floor and put shifter in 1st and the car will die, without letting the clutch out. Could the IAC have something to do with this stalling? Any help with this would be great.</P>

95Stealth302

Or the EGR, or vacuum pressure, or throttle body position, it could be a number of things, im having the same problems too, but my idle is now at like 2000 rpms, i think i have a vacuum leak

mdvaldosta

1st thing to do is clean the IAC valve or ISC motor(whatever you wanna call it), its on the throttle body, just take it off and clean it with brake cleaner. Then check your TPS voltage to ensure it is where it needs to be. You can also spray carb cleaner around all your vacuum connections,vacuume lines,and egr valve to ensure you have no leaks (your idle will change if you spray on a leak).

a90mustang

Ok I cleaned the IAC and the throttlebody and checked for vacumm leaks but none. The car is still doing the same thing. Any other ideas of what to look for?

vshayes

Check your tps voltage.. key on engine off it should read .96 - .98 volts. Be sure to ground through the plug too. Its kinda hard to check it cause you gotta do it inline. I make jumper wires from the plug to the tps and check voltage from the jumpers.

a90mustang

Well I pulled my codes and this is whatI got. 34 67 Bad egr and Neutral safety switch. Gonna get these 2 parts tonight. I am thinkingthese will solve my problems.

mdvaldosta

yea that egr valve can cause your problems. Oh, and vshayes was me by the way, I accidentally posted under her sn lol

a90mustang

lol</P>


Thanks for the help. Hopefully this will fix the problem.</P>

Pitviper100

a90mustang where u located at in Ohio? also do you have any spare parts for an 86 5.0? if u live close to me this could be some convienance