My car wont start unless I give it gas and hold the pedal until it warms up after I installed a skunk 2 pro series manifold and skunk 2 pro throttle body. I bought a new blox tps sensor and calibrated to the stock position. any ideas on what could be the problem? rpm's aren't a issue after it warms.

 

It sounds like the tips was installed incorrectly

 

I calibrated to the ohms my stock tps was. i dont get any cel on either. It runs perfectly fine when i warm the car up. Could it be a defective tps?

 

You have iacv unplugged or the the wrong connector going to the sensor.

 

I plugged everything where its suppose to be. i double checked everything.

 

Is the car running rich/idling rough?

 

Iac not plugged in would be my first suspect.

 

No it runs fine after i warm it up. Its just at start up that my car doesn't stay on unless i keep my foot on the pedal until it warms up.

 

I cleaned the iac and made sure its plugged in too.

 

What are the colors of the wires running from the plug you have connected to IACV?

Do you have the coolant lines connected to the IACV?

Which skunk2 manifold, what size throttle body?

 

The wires are red and yellow. They have a plug going to the manifold as well. I have the gsr pro series manifold and the 70 mm pro series throttle body

 

Aren't thevred and yellow wires for the iat sensor?

 

Check the TB gasket, when i got mine it was the wrong one

 

I have the same issue when i changed my pro series to a ultra manifold sometime later it starting doing that. I believe its the ECT sending unit sensor under the dist next to the ECT sensor.

 

What year is the engine harness? It's sounds like you have the purge control solenoid connector (not used in most swaps) plugged into the iacv. My obd1 harness has blue/yellow wire and yellow/black wire going to iacv.

 

Also Blox's garbage TPS is known to have issues. Unless the OEM wasnt reading right and couldnt be calibrated, i would just use the original one.

 

This, I have a friend using the blox tps and he only had it for less than 2 months and it became garbage. I gave him a used oem one and problem solve.

 

Skunk2 pro throttle bodies eliminate the Fast Idle Thermo Valve (FIT valve). This is done to keep the throttle body cooler when the engine is hot.

The FIT valve was there to add air to help the car start when it was cold. Without it, you have to do exactly as you describe and keep the throttle open to let the engine build a little temperature before it will hold its own idle.

This actually sounds pretty typical of how they act after installation and without tuning. Tuning will help, but not necessarily eliminate this problem.

 

Weird because I didn't have this issue when I had a type r sk2 70mm alpha tb and pro series manifold but when I swapped them for the ultra manifold and 74 mm pro tb I'm having the same issue. And I don't believe there's a FIT valve on the oem ITR tb or the sk2 tb's only the gsr and the ls have them but I could be wrong.

 

I deleted my fitv on my stock gsr throttle body and have no issues starting my car in the morning especially today when its about 45 degrees outside.i think the car runs and idles a lot better without it.
I also have a skunk2 pro series intake manifold..


op disconnect the iac valve and start the car. what happens??

 

Wondering now if it is the iacv cause I'm having the same issue.. I'm gonna disconnect it and see what happens when I start it I'm guessing if it still has issues starting it just might be the iacv?

Weird thing is sometimes on a cold morning it starts fine and some days it needs the throttle open for a few secs to hold idle. After it's started and I drive it for a while and park and start it again later even after a few hours it starts fine..

 

sounds to me like your iac might be on its way out.

 

Hmm maybe, I'm also using a outlaw engineering gasket kit which uses a thick thermal spacer for the iacv now I'm wondering since it worked fine when I had it on the skunk 2 pro series manifold that when I upgraded to the ultra street manifold maybe the new location the iacv is relocated at might have an effect on my cold morning starts because of the thick thermal spacer I have on and or the valve is just on its way out. I'll try taking off the spacer and clean out the valve and see what happens.

 

make sure your valve has the screen filter on it.thats what keeps it from getting gunked up.

 

Yea the filter is there, last time I cleaned it it was a bit dirty.