F20b swap revs to redline by itself.

[TracieS]

So I did my swap got it running its not throwing any CEL's. But when you start the car it automatically revs all the way up I turn the car before it gets to high. Its like the throttle is hung open but it isnt. I changed the throttle body thinking it was the TPS and still the same thing. I tried to Google this and all I get is what is stock redline of the engine. SO any help is appreciated.

[dj_ender]

So I did my swap got it running its not throwing any CEL's. But when you start the car it automatically revs all the way up I turn the car before it gets to high. Its like the throttle is hung open but it isnt. I changed the throttle body thinking it was the TPS and still the same thing. I tried to Google this and all I get is what is stock redline of the engine. SO any help is appreciated.

I guess the obvious suspects are a stuck open butterfly in the intake, or your throttle cable is too tight. Did you read the setting on both TPS's?

[TracieS]

The butterfly is closed and no I didnt check the tps on the other one it was pulled off my buddy's running car. And then put it back on his car and it worked on his car again.

[dj_ender]

The butterfly is closed and no I didnt check the tps on the other one it was pulled off my buddy's running car. And then put it back on his car and it worked on his car again.

What about the throttle cable?


Wait, are you sure you didn't mix up the TPS and MAP plugs?

[TracieS]

I mean I can check it tomorrow but I dont think its tight and its not pulling on the wheel to turn the butter fly. And from the inside of the car the pedal feels fine. I may just unhook it and start it that wya and see what happens.

Map is hooked up behind the dash and pluged up in there I never even unplugged it.. I deleted the emission on my car.

[dj_ender]

I mean I can check it tomorrow but I dont think its tight and its not pulling on the wheel to turn the butter fly. And from the inside of the car the pedal feels fine. I may just unhook it and start it that wya and see what happens.

Map is hooked up behind the dash and pluged up in there I never even unplugged it.. I deleted the emission on my car.

Also, did you reuse the CB harness, or make your own/mod the CB one?

[TracieS]

Its a stock uncut cb harness I haven't tucked my bay yet just so I can work out all the bugs then once it done it going to be tucked.

[dj_ender]

Its a stock uncut cb harness I haven't tucked my bay yet just so I can work out all the bugs then once it done it going to be tucked.

Damn, there's not a whole lot of things that can control the gas. Only other thing i can think of is the set screw under the rotor is screwed in too far. what happens if your try starting the car without the TPS plugged in? And are you using a chipped ECU or an OEM one?

[TracieS]

Same thing starting it unpluged revs right up. I can check set screw tomorrow to. Thats why I made this thread I am at a lost and I am usually really good at figure out what is wrong cars.

[markrutherford]

The stock redline is 8200-8500 rpm depending where you look. Ive taken mine to 8500 with no issues. But did you replace the f20b intake manifold and injectors with h22a1 parts like I said?

[TracieS]

Yea I put a h22 IM and injectors on it today. Im running a p13 ecu to.

[dj_ender]

same Thing Starting It Unpluged Revs Right Up. I Can Check Set Screw Tomorrow To. Thats Why I Made This Thread I Am At A Lost And I Am Usually Really Good At Figure Out What Is Wrong Cars.

Ecu?

Never mind...

[markrutherford]

Yea I put a h22 IM and injectors on it today. Im running a p13 ecu to.

Dont use a p13 with the f20b. it will run like crap! That might be your issue right there. Just wait till you get the chipped ecu from drummersteve.

[tm123]

yeahh check the idle set screw
see if someone has messed with it
if they havent the paint should still be on the head of it.
someone had the one all way out on my h23 IM.
i just snugged it back down and then a half screw to the left

[dj_ender]

Dont use a p13 with the f20b. it will run like crap! That might be your issue right there. Just wait till you get the chipped ecu from drummersteve.

I was originally thinking the TPS wires got switched around, that's why i asked if it was a modded harness. I wonder if the pin outs are different on the P13 than the PCB....