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Injector Duty And Timing

T.D

By T.D,
in Engines & Forced Induction

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T.D Experienced

T.D

Posted
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Alright cool, I was planning on doing it that way but wasn't sure if it'd be the correct reading as I tried to test the VCT with the hand controller but when I unplugged the plug for the VCT, hand controller still told me it was activating and deactivating haha

Would using a multimeter be a more accurate measure?

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Beer Baron Grand Master

Beer Baron

Posted
Posted

I'm pretty sure my car has been a manual all along though. Dash cluster is a manual one, the stock ECU that came out was a manual one and there was only one other owner of the car before me. Weird.

.....don't forget the half a dozen owners in japan before that guy too...

T.D Experienced

T.D

Posted
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Ahhh I see. No dramas then, on my lunch break I'm gonna go sit in my car and start mashing the throttle without starting it haha

On one hand, I kinda hope the TPS is the problem as I'm starting to get over the fact my car barely makes more power than a midly-fettled GTS-t pinch.gif

T.D Experienced

T.D

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Posted

Just a bit of an update.

Car overheated today as the rubber hose connecting the turbo water line to the block split and caused coolant to spray everywhere. Car had to get towed.

Which raises the question, if there was an issue with the cooling system, how much would this affect timing and if it does, what hardware will it affect to cause the timing issue (eg. the turbo becomes heatsoaked and in turn superheats the air)

Also worth noting the car has run hotter than normal since the timing issue surfaced, so not sure if timng issue and overheating issues are 2 isolated problems or are connected somehow.

Ideas and thoughts would be great :)

  • 5 months later...
twinky Newbie

twinky

Posted
Posted

Oh forgot to mention, knock usually occurs in the upper RPM range. At first we thought it was a VCT issue as that's when the knock starts becoming very unstable but we've ruled out the VCT by running it both plugged and unplugged.

Also worth mentioning that the fuel rail around cylinder 4,5 anıd 6 has gone from the factory greeny-metallic colour to a heated titanium sort or bluey-rainbow colour.

The Mafia Grand Master

The Mafia

Posted
Posted

if the car is getting hot, and is underpowered, then there is a very good chance that your timing is retarded.

Your CAS might be stuffed.

I'd be checking the timing with a timing light, and then if you do adjust the cas, I wouldn't be driving it around hard until a retune is done.

twinky Newbie

twinky

Posted
Posted

Ok thie relates to my last post ... Tried to copy info and add using the phone ... Didnt work ...

Anyhow, just thought, if there was no change between having vct connecyed or not, could that not indicate that the vct is not working?

Also, excess fuel flow is iften used the keep the fuel rail cool. The fuel rail gettinh hot to tye point if discolouraton my indicated that you hage reduced flow out of the rail and hence cooling flow to the rear injectors or you have something making it hot. This would heat the fuel and change the fuel flow out of them. If up, the ecu would lean out the others if flow goes down, well theres your knock.

Just my thoughts.

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