Hey Guys, I'm working on a 1987 N/A 5spd transmission car. I have put almost 40 thousand miles on the car since rebuilding the engine after it blew the headgasket at 121,000 with no problems what so ever...untill now... Whats happening is that the car would not idle any lower than 1,100 rpm. I figured the problem was attributed to a bad vaccum line, so spraying some throttle body cleaner lead me to the back of the engine near the EGR valve, i replaced all the vaccum lines in that area and when i checked the egr vaccum modulator per the tsrm, it tested bad. figuring that was the problem i replaced it with a new unit. It did not fix the idle issue and furthermore it caused the engine to cut out around 2500 rpm while driving...could my problem be attributed to the egr valve going bad with only 40,000 miles on it?? any ideas guys??
7MGE Will not idle correctly, please help.
- Thread starter surf24365
- Start date
I can't really help with diagnosing the EGR system, but have you also checked the TPS alignment and the ISC? You sure there are no other vacuum leaks?
Sorry I can't be of any more help, at least with a bump someone with more info may pop in.
Sorry I can't be of any more help, at least with a bump someone with more info may pop in.
I had a bad vac leak that was causing my idle issues it ended up being the first injector botom oring half of it had been pinched durring swap. $2 buck part fixed it.
Wiggle the injectors 1 by one and see if any move freely. I would get the full kit for like $28 bucks and do the 0-rings and save a headache lol.
Anytime you have a high idle speed, start by checking that the Throttle Position Sensor (TPS) is adjusted correctly (and is not broken). I have the EGR system completely disconnected (isolated) on my N/A and disconnecting it had no effect on the idle speed.
If the TPS idle switch (IDL terminal) is not on at idle (one of the TSRM checks), the idle speed will go up to 1000-1400 RPM.
Hope This Helps, Skip
If the TPS idle switch (IDL terminal) is not on at idle (one of the TSRM checks), the idle speed will go up to 1000-1400 RPM.
Hope This Helps, Skip
My idle was erratic, but high. It would rev up, almost to 2,000 rpm then drop back down to 1,400 or so and then right back up. Toyota dealer diagnosised it as the Idle Air Control Valve.
It is located on the front side of the manifold, two 12mm screws / 3 hoses / electrical connection. You can find the part online for about $300. FYI: The Toyota dealership by me wanted over $700 for the part and $80 labor to install.
It is located on the front side of the manifold, two 12mm screws / 3 hoses / electrical connection. You can find the part online for about $300. FYI: The Toyota dealership by me wanted over $700 for the part and $80 labor to install.
Clip;1184371 said:
I didn't spend $700, I bought the part online for around $300 and put it on myself.
Check the for sale section I have one sitting in a bucket behind my house off my old engine "worked fine" but I changed engines for a third time and tossed it.
Thanks guys, i put a brand new Tps on the engine and it seems to have fixed the idling issues but i'm still having a problem with the engine kind of cutting out or losing power between 2 and 3 thousand rpm under load. almost as if it were hitting some sort of fuel cut? could this just mean i need to adjust the tps more?
radero;1184361 said:
was your car every idiling properly 6-900? if it was did you ever take the tps off? if you did and with your symptoms you just put it on incorrectly.i had the same problem cause i put it on wrong..rule number one of owning a supra never take it to toyota for labor NEVER they will chop off your arm to make profit. i know people that work there they tell me all the timeif you want examples just ask.