Hey did a hg on the 7mgte and it starts right up but idles at 3k rpm or higher. Now I haven't messed with the idle screw or tps and it idle fine before the hg. I noticed that if i take the silicon hose off the turbo the car will idle correctly and smooth but will run pig rich well of course because of boost leak can some one help me.
high idle after headgasket install
- Thread starter dee242
- Start date
https://www.youtube.com/watch?v=PAW45g6mCDk&list=UUFxsC5qqvsssLWEbGveyiTw
found it but still have a problem
found it but still have a problem
You need to find the leak downstream of the throttle valve. The upstream leak at the TB coupler would not cause a high idle problem. I'd start by making sure the throttle plate closes fully.
Have you unhooked the throttle rod going to throttle body. I would try unhooking the throttle rod to throttle body. Then check idle.
For those of you that have properly running engines try this: pull the brake booster hose off. Let us know if the idle increases. If you think the resulting stumble is because the leak is too big try modulating it with your finger. Again, observe what the idle does...
The throttel plate was clean and fully closed but i could get it to idle lower to where the car cuts off if I pushed on the linkeage really hard.
dee242;2028081 said:
It won't. That was my point. On L Type EFI systems pirate air will not increase idle speed. The only things that will are bypass air (air around the throttle plate), timing, or fuel.
Assuming the last two are good it has to be the first. That means the ISC, throttle plate, or PCV systems. If the throttle plate is closed, the ISC hose is pinched off, and the PCV system blocked, the engine can't run.
Crack me up. Because a leak in the lower manifold is different than a leak caused by the booster line being off...
Well maybe it has a map sensor.
Naa I guess not.
Are you positive that the throttle plate is setting against the stop screw? See page FI 102. So did you take a pair of needle nose visegrips and squeeze closed the hose to ISC. I cant' see that much air from PCV port however you should clamp that off close to throttle body also. Have you looked at page FI 18 in the repair manual.
Naa I guess not.
Are you positive that the throttle plate is setting against the stop screw? See page FI 102. So did you take a pair of needle nose visegrips and squeeze closed the hose to ISC. I cant' see that much air from PCV port however you should clamp that off close to throttle body also. Have you looked at page FI 18 in the repair manual.