ok lately my car is sometimes having problem starting up, it would turn over and over but will not start, i swap out the ignitor with another one i had around, and i have a fairly new MSD coil.
I checked the spark and i am getting spark from the wires.

Also WHEN it starts, the car drives FINE, but as i get up to 6000 RPM, i can gradually feel it loosing power, and it bobbles a little.

Only strange thing i noticed, is when i have the ignition ON, but engine is NOT RUNNING, i can hear the fuel pump constantly running. normally it would run for a few seconds then stop

any idea what this could be.

---history right before problem
-installed the obd2-obd1 harness and chipped OBD1 ECU
car ran fine, lots of power, no problem

-installed UBERDATA and car still runs fine & pulls hard
no problem.

then a week later...problem stated.


ANY IDEAS OF WHAT COULD BE WRONG?

 

ttt.


well today i decided to do FULL tune up.
( is did a ingnition tune up and oil), now i will change fuel filter, and MAIN relay.

 

check for leaks in the fuel line. could be constantly running trying to build pressure.

 

I AM HAVING THE EXACT SAME ISSUES WOULD REPLACING THE MAIN RELAY DO ANYTHING? I HAVE TRIED EVERYTHIGN ELSE DOWN TO A NEW FUEL PUMP!

 

I FOUND THE PROBLEM

The ECU is the problem, i tried a different MAIN RELAY, and the nex thing was to test for leeks, BUT that was not it.
Then i decided to try the ECU, and YES it is the ECU.
I hook up my old GSR p72 OBD2 ECU, and fuel pump turns on then after 3.5 seconds it turns back off (just like normal). And when i put back in the Chipped OBD-1 ECU the problem comes back again.

BUT i then there is the problem of my car loosing power at higher RPM. that is still be be solved, it still happens with the OBD-2 and OBD-1 ECU.

so only one problem solved.

 

i dont get it? you swaped in the p72 and the pump fixed itself, and when you swapped back in the p28 it's still fixed?

 

yup..................

P72 is OBD2
P28 is OBD1

------------------------------------------------
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i still have the problem where i loose topend power.
feel like the engine is Shacking/rocking *back and forth* when i am in boost at higher RPM.

 

got to love those standalone's.

 

do you have vtec? if so is is kicking on? when my oil was low and not building up enough pressure my car would die off at about 6k because vtec didn't activate.

 

well i kinda found the problem, well not really, my tunner said my timing seems off.

tomor i will check the timing, and see whats up.

hey 98ctr i hook up both ecus on other cars, and they work fine. the only thing i could not check is the uberdata chip on my friends cars (N/A setup).
BUT no matter what ECU i use, STANDALONE or HACK the problem is still there. so it is with the ignition (coil or ignitor) or base timing and not the ECU.


good night guys...i'll call it a night here