Forum Oficjalnego Klubu Mitsubishi - MitsuManiaki

[beaner]

hi,
just got this 89 colt gt turbo recently.
it only has 100k miles on it.

at first there was no spark,
so i change the cam angle sensor, the ecu, and the ignitor chip and
now it gets spark.

also it gets fuel, i smell it on the plugs and in the tailpipe

i also put in newer spark plugs, and they spark also.

when the car tries to start, the cranking is very healthy.

for a few days it would just turn over, yesterday it sputtered for a few seconds but nowhere near a start.

can anyone help me figure this out? i am lost on what to do, unless the wiring harness has problems or there are electrical gremlins.

the person who i bought it from, said it ran for a few weeks but then stopped.

also the compression is almost perfect in every cylinder

thanks

pmmcky beaner

hi,
just got this 89 colt gt turbo recently.
it only has 100k miles on it.

at first there was no spark,
so i change the cam angle sensor, the ecu, and the ignitor chip and
now it gets spark.

also it gets fuel, i smell it on the plugs and in the tailpipe

i also put in newer spark plugs, and they spark also.

when the car tries to start, the cranking is very healthy.

for a few days it would just turn over, yesterday it sputtered for a few seconds but nowhere near a start.

can anyone help me figure this out? i am lost on what to do, unless the wiring harness has problems or there are electrical gremlins.

the person who i bought it from, said it ran for a few weeks but then stopped.

also the compression is almost perfect in every cylinder

thanks

pmmcky beaner

[Carl Morris]

That's an unusual one, it sounds like you've successfully verified spark and fuel and that the timing belt isn't broken . Have you verified the firing order, that the spark plugs are connected correctly? I realize that doesn't go with the idea that it used to run OK and nothing has changed since then.

Do you have access to a datalogger? If you have a laptop with a DB9 serial connector it's not too difficult to make the cable and "borrow" the software. It would be interesting to know if your mass air meter signals all look reasonable.

If you really do have spark that's timed in the general vicinity of correct, it implies that you either have way too much or way too little fuel. Do you have a way of checking fuel pressure? There's always the chance the filter is clogged or the pump has died.

That's an unusual one, it sounds like you've successfully verified spark and fuel and that the timing belt isn't broken . Have you verified the firing order, that the spark plugs are connected correctly? I realize that doesn't go with the idea that it used to run OK and nothing has changed since then.

Do you have access to a datalogger? If you have a laptop with a DB9 serial connector it's not too difficult to make the cable and "borrow" the software. It would be interesting to know if your mass air meter signals all look reasonable.

If you really do have spark that's timed in the general vicinity of correct, it implies that you either have way too much or way too little fuel. Do you have a way of checking fuel pressure? There's always the chance the filter is clogged or the pump has died.

[beaner]

[Krzyzak]

my advice is to check fuel pressure close to injector pipe (after fuel filter)
it should be from 250 kPa (closed loop) to 350 kPa (open loop), where closed and opened means, that vacuum hose (black with blue stripes) is connected or not to the fuel pressure regulator (at the end of intector pipe)

as an example i can say, that my friend got something like you - someday his car stopped and didn't work;
there was a problem with ECU (capacitors), and after change this caps spark back; i smell the fuel (after removing spark plug), but (after 3 months) it shows, that the fuel pump was bad - his mechanic change the fuel pump, but not brand new - it was regenered, and the pressure was too low to start
after change fuel pump to brand new car started and is 'on-line' to now

firing order is 1-3-4-2, where 1 cyl. is on timing belt side - you should check, that the spark is on all sparkplugs

when there are: spark and fuel, and they're in suitable time, the explosion engine MUST work; to synchronize it is used a crankshaft position sensor
if you replaced ecu, cam- and crank-shaft sensor, coil and fuel pump it should be working

[Carl Morris]

[Hubeeert]

All posibilities are described in service manual.

If you have checked everything I would check the ECU once more because when this small things blow they usually damage the small lines on the surface. Or you just forgot to weld the "legs" on both sides. There is no black magic in it - if everything else is OK then it has to be ECU or blown motor.

[beaner]

[Hubeeert]

As far as I remember there are some differences between Mirage Turbo ECU and 1G one.
I am not sure if they are just bolt on.

[beaner]

[shovel]

i wish you good luck. i had some similar problems with my last galant. there was a spark, there was a fuel, but motor won't start. it was always almost and sometimes there was a shot into a intake. timing belt was good, ECU didn't report any errors. I gave up on it, i sold engine to some guy in Cracow and he is very happy about way engine works. It was some sort of problem with electronics, but i didn't have a time/enough good will to check every sensor. write about what was a reason of failure.
good luck.

i wish you good luck. i had some similar problems with my last galant. there was a spark, there was a fuel, but motor won't start. it was always almost and sometimes there was a shot into a intake. timing belt was good, ECU didn't report any errors. I gave up on it, i sold engine to some guy in Cracow and he is very happy about way engine works. It was some sort of problem with electronics, but i didn't have a time/enough good will to check every sensor. write about what was a reason of failure.
good luck.

[Carl Morris]

[Hubeeert]

[beaner]

hi,

it is possible that the injectors in the engine are in correct from the old older. they are pink top hat injectors. does anyone know what CC the pink injectors are?

thanks

hi,

it is possible that the injectors in the engine are in correct from the old older. they are pink top hat injectors. does anyone know what CC the pink injectors are?

thanks

[Carl Morris]

I thought they were the stock 390s.

I thought they were the stock 390s.