Vr4 won't start, weak spark and apparently no injector pulse

[josh_tsv]

Hey all my car wont start the guy fom RACQ sed that i dont have any injector pulse and very weak spark, I have access to Trooper shannon written of Jspec to swap parts what should i do? I have checked for volts on the injector plug and there is 12v on both pins shouldent it only be on one side?

 

[3zercrowd]

BUMP! come on guys He need all the help he can get

 

[CLuTZ]

I'd be swapping over the ignitor and coil pack from another car to see if thats the problem......

sounds like its an ignition thing- it gradually got worse after starting to hesitate and play up around the 4k rpm area, a typical ignition problem.....

have you pulled the spark plugs out and had a look? leads poked?

pull your ECU out and have a look at that, swap it for another to see if thats the cause.....

without paying someone to test/look at it, its trial and error i guess mate....

 

[Entaran]

swap over the coils and see what happens.

 

[bazeng]

that i dont have any injector pulse and very weak spark,

no pulse could have something to do with power

weak spark also

if your getting spark thats a good thing, it means your cas should be good (is it in sequence?)

did this just happen all of a sudden??

anyway,
injector pulse, check the resistor pack, check the fuses in the engine bay
also there is a loom plug near the air filter which powers the injects.. check that its securely plugged in

my guess is that its a power / ecu thing
the ignitor doesn't effect injectors, and if your getting spark the ignitor is doing its thing

check your voltage at your injector plugs (the ecu gnd's them) you should be getting 12v in one wire, and gnd in the other...

check voltage as the resitor pack also..

im blabbing on.. give us more info and ill try to help you more..

 

[Sloth]

Remeber the basics. An engine needs fuel & spark at the right time in the right amounts to work. If it stops, one or both is missing. If it is just one, check that system. If it is both, it has to be in the control systems.

You seem to have two systems that are at fault, fuel & spark.

Logic says that the solution has to be where the two systems are working together, that is, either where they get their info (sensor problem) or their control signal (ECU).

Make sure all the sensor plugs are clean, etc.

 

[SIVART]

I would say ecu, it happens to these a bit and you will change everything first and the the ecu last go with the ecu first

 

[josh_tsv]

Hey thanks alot guy I got the problem fix its was a dogey fuel pump relay, got that sorted but still got weak spark . Pump had been rewired and when i found the relay it was full of water, replaced it and now all good.

 

[jerome266]

I'm having similar problem just upgraded manifold put everything back together and wont start got spark got fuel but no injector pulse checked all fuses coils etc seems fine I'm thinking ecu will swap that out and see how it goes ... And I just sold my spare ecu ... Murphys law