1G 1990 car won't start, ecu?

[mr2turbo]

car is a 1990 gsx, so anyways I was driving to the gas station as I pull up to the pump there's a bunch of clicks coming from the dash (ecu?) then the car dies so I just try to start it back up, it starts but has a hard time staying started. I just put gas in and then it starts up fine and I drive off, I go about a mile down the road then the clicking starts again and the car shuts off and won't come back on. as I hold the key in the start position it almost starts but as soon as I let go of the key it dies.
so anyway, upon further inspection the clicking sometimes comes from dash or sometimes from the fuel pressure solenoid.also with the key in the on position the factory boost gauge fluctuates from 14 to 7 or 0 or anywhere in between. I hear the fuel pump and everything

cliff notes- car won't start, clicking noises from dash and sometimes fuel pressure solenoid, factory boost gauge fluctuates with key in "on" position.

thanks for any help

 

[siege]

pull the ecu out and check for leaking caps when the ecu is open you cant miss them you may need a flash light good luck

 

[mr2turbo]

cars not at my house right now, but when I get a chance I will

 

[siege]

the same thing happend to my talon so i sent the ecu to pina motor sports in kent WA. they put in new caps for about 50.00 dallors and the car has ran great

 

[mr2turbo]

the same thing happened to you with the clicking and the car not starting?

 

[Auto RS T]

To clear things up the FP solenoid is under the hood.

The Fuel pump relay is under the dash and should click once when you turn the car off.

I would also suggest taking out your ecu and checking the caps for leakage, and signs of damage to the board. It is fairly common.

 

[mr2turbo]

yeah, I know I go under the hood and hear the clicking from the fuel pressure solenoid

 

[siege]

ya it would click from the ecu and not start for about 15 minutes when it would start the ecu would click and the car would stop running

 

[mr2turbo]

yup pretty much

 

[steve]

That sure sounds like the caps leaked and the ECU is crashing.

Steve

 

[mr2turbo]

it's not the ecu, mpi relay, or cas, the injectors are getting power but they won't open.

what is it?

 

[Auto RS T]

How did you eliminate the ECU?

Did you swap it out with a known working unit, or just look a the board?

Just looking first is only a visual inspection, to truly eliminate the ECU you should swap it out with a working unit.

 

[bushy]

it's not the ecu, mpi relay, or cas, the injectors are getting power but they won't open. what is it?

Have you actually swapped out the ecu? The MPI Relay as well? Like auto said, visual inspection can not prove if it is functioning or not.

with the key in the on position the factory boost gauge fluctuates from 14 to 7 or 0 or anywhere in between. I hear the fuel pump and everything

Also, there's no way you can be hearing the fuel pump with the key on the "on" position. On these cars, the fuel pump wont energize until the car is actually cranking over.

 

[mr2turbo]

I swapped out the ecu and mpi relay with as far as my knowledge working ones, I hear the fuel pump when the car is cranking/shortly after is what I meant