I was driving along when all of a sudden the car starts loosing power(engine) then it just turned off, check all things like mechanical timing full gas tank the distributor is fine. When I turn the key the engine light comes on and stays on but no prime/click, fuel pressure is at 0 con firmed via a gauge. when I go to start the car it just spins and spins not even a sputter.


pls help



I have a 255 walbro I might try and throw in soon

 

You said you were using an s300 right? My friends ecu has those symptoms some times where it'll just erase the map and lock out, solid cel and no priming or anything. Try using a stock ecu or reuploading the map.

 

check your ecu fuse in the engine bay!

 

that's what I am using, my good old chipped p30 the s300 got sold



they're both good I'm leaning to wards the damn ECU

 

before you get into the ECU, have you checked for voltage at the actual pump connections, at key on? maby it's just a bad pump? should see a voltage for a second or two when you turn on the key

 

just installed a new(from the box) walbro 255 still no go have pics of the main relay and ECU to post up.

 

Oh well if thats the case the ecu is most likely done for. My obd2 p75 did the same thing, I was driving home car sputtered for a few second lost power and had a solid cel. But check the other stuff first and see if you can try a different ecu. You might be able to replace the main capacitor on there and get it working again.

 

pics: 1st JDM chipped p30 ECU had for over a year now 2nd main relay as I unplugged it not touvhed at all 3rd 2nd part of p30 ecu last main relay again. that last pic looks to show a burn ? can anyone confirm EDIT: tested one lead to the main relay it was getting power(outer side) the other didn't tired jumping the OBD plug SOLID CEL no matter what

 

it could be a bad ground to your pgm-fi main relay maybe? ive done kill switches disrupting the ground and when its not tripped this exact same thing happens, solid cel no matter what, no prime, solid crank but no dice. im no expert but its just a thought

 

^^^ and like i said, im no expert, but that board looks burnt up to me

 

the car has no alarm devices at all the grounds are all good and tight/clean from experience solid cel=done ECU but I've had that before and the car still ran(I think). It was a long time ago but I tested one lead to the main relay and it got power on the other side it didn't tho.

 

Plug PGM-FI Main Relay in, turn ign. switch on, use jumper to supply a ground to the green/blue lead going to the PGM-FI Main Relay.

If pump turns on, problem is the ECU/ECM, [or connection problem between ECU/ECM and relay. 94

 

turned out to be the relay and when the relay went it took the SRS fuse with it, I have no clue how those 2 are connected but I've got it going again.

thx guys