I finished up my swap and the car does not stay started. It seems to rev fine, but I have to give it gas and keep it above 1500 rpm or it dies. I tried holding the RPM's up for a few mins thinking it needs time to warm up, but it still dies when I let off the gas.

So, here are some details:

2002 Maxima motor in a 97, 3.0 timing equip
3.5 oil pan, 3.5 CPS, spliced in
No IACV, no evap
converted throttle body, 3.0 TPS
Headers, y-pipe, UDP and Stillen Flywheel
Aeromotive FPR--I dont know the Fuel pressure, but I have experimented with cranking it up and it doesnt seem to matter too much, still dies.

Codes are for the IACV and EVAP and oddly, Intake air temp, but no CPS POS or REF codes.

I can start it like stock without any problems.

I've been searching all sorts of thread for about 3 days. Any ideas??

 

You have a converted throttle body, meaning you modified the 3.5 E-throttle to use a cable? You know that the butterfly must be slightly open to maintain an idle speed. There's a screw on the bottom that will allow this. How's your TPS adjustment? You checked the output signal to the ECM?

Face it, without an IACV or cold start plunger, it's going to be fussy. Sounds like you should double check for a vacuum leak as well.

 

Adjust the set screw on the bottom of the TB and it should stay running on its own until you can fix other issues.

 

Did you ground the coils, injectors, or w/e is it that needs to be grounded.

 

I think GTR got it on this one. It's most likely the adjustment screw--I forgot all about that. I tried to give it a turn and the screw seems frozen. I am going to grind off some flat areas to get some vice grips around it when I get a chance tomorrow. Thanks for the help.

 

It should be a screw with a locknut surrounding it. Loosen the nut first, I believe it is 8mm.