spark plugs drenched help me

inha · Post by **inha** » Fri Jul 27, 2007 10:28 pm

good night everyone, i have my volvo 480 turbo at the repair shop and i've changed everything that i could think of already but i still have a problem, the spark plugs get drenched and the car won't start, what could it be? if i turn off the fuel pump it starts but as soon as i turn it on the spark plugs get drenched, can any one help me please ? before the car stop for the first time i regulate my MBC to 0,6 bar or a litle more but the car sob, than i put 0,5 bar and the car go fine 1km and than stop. But i think the problem not come for that. help me please

Oese480T · Post by **Oese480T** » Sat Jul 28, 2007 6:41 am

Did you check the injectors?

And what's about the MAF, is it set correctly??

inha · Post by **inha** » Sat Jul 28, 2007 8:20 am

yes i chek. i have a clio williams injectors but i remove and put the original injectores and the probleme donÃ‚Â´t stop

Oese480T · Post by **Oese480T** » Sat Jul 28, 2007 10:43 am

whats the maf resistance reading measured between pins 1 and six without the connector attached?

inha · Post by **inha** » Sat Jul 28, 2007 12:47 pm

can you explain better, i m portuguese somo leters i canÃ‚Â´t understand

inha · Post by **inha** » Sat Jul 28, 2007 1:05 pm

i donÃ‚Â´t now whats the maf resistance reading

Oese480T · Post by **Oese480T** » Sat Jul 28, 2007 2:45 pm

I'll try...

The MAF is the mass air flow-meter directly behind the air filter...

It's a black thing with a cable

you have to remove that cable when the motor is off

then measure resistance (ohms) between the two outer pins of the cable connector

should be between 300 and 550 Ohms...

Big Brother · Post by **Big Brother** » Sat Aug 11, 2007 5:25 pm

OP updated -- Bump

rpruen · Post by **rpruen** » Mon Aug 13, 2007 8:28 pm

This is a failed transistor in the fuel ECU. Or the wire to the ECU from the injectors is earthed somehow.

The injectors will stay open all the time and flood the engine with fuel. The transistor can be changed.

The actual transistor in the ECU is a darlington pair, with an HFE of 1500 and current capacity of 5A. There are several modern types that could be fitted most have a current capacity of 10-15A.

Richard

inha · Post by **inha** » Mon Nov 26, 2007 10:07 pm

tks rpruen the car now is good

, the problem is that transistor

.

shimon340 · Post by **shimon340** » Tue Nov 27, 2007 11:54 pm

which transistor causes the problem? could you post some pics please?

thanks!

shimon