Engine wont start without feather the throttle

[kyral]

Ka24de
Car starts and run but will fire occasionally with throttle closed but wont get running unless the throttle is being feathered. Car idles great once running
any idea what the issue might be? the car also runs like dog shit when you put it under load or rev the engine

Has a brand new knock sensor and 02 sensor.
unplugged maf and car dies and wont start til its plugged back in.
unplugged the red coolant sensor and the car stuttered a little and kept idling
unplugged tps nothing changed
unplugged knock sensor, no change
fuel pressure tested at 40psi at idle and 47 while the pump was priming

i tried advancing the timing run kinda shitty, then retarded it and it didnt want to run

could this be a fuel injector issue? i tested them all with a 9v and a voltmeter ea clicked open and tested at about 10.8ohms which is right where they should be

could my ecu be the problem? or even a collant temp sensor?

[RB25GUY]

would help to tell us what motor check the Cam angle sensor if it has one, or the distributor, fuel pump could be the culprit.... so many different variables.

[kyral]

Its a ka24de.
The fuel pressure is a stable 40 psi so my FPR must be working. and while priming it goes to 47 psi so i know my fuel pump works. unless there is something im missing? fuel pressure never drops below 40 psi and 40psi is right about where the system should be

The CAS is part of the distributor iirc and i have played with advancing and retarding the ignition. both either made the car harder to start or impossible to start

[bardabe]

check your crank signal to the ECM, if ECU doesn't have crank signal that's why you are needing to touch the gas.

[anthony_240]

Clean your throttle plate


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[S-Verteen]

If i remember correctly when you unplug the tps the idle raises slightly. maybe ohm out that tps i have had one fail on my sr. Also have you checked the plugs?

[Ka24deguy]

How do I start a new thread. New member here lmao

[kyral]

its all good ka24de guy. you might have to do like 10 posts before you can open anew thread. or its at the top left of the stickied threads.


My plugs are good brand new. so they are kinda hard to read, my throttle plate is clean. this ia fresh engine rebuild, if i didnt replace it i cleaned it

ended up being my ecu. i swapped out my 25 (auto s13?) for green 29 i think i just know it was a cali auto ecu but i dont have the sensor on my intake manifold hooked up but it doesnt seem to bother the ecu one bit. car starts without throttle nowand has power. i just drove it around the block. its weird that the ecu was letting it idle correctly but not rev