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Inconsistent starting

SeriesIIGTST

By SeriesIIGTST,
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SeriesIIGTST Mentor

SeriesIIGTST

Posted
Posted

Hi all,

Just wondering if anyone could shed some light. Situation is as so:-

1) New plugs gapped to 0.8mm

2) Cleaned and flow tested injectors - all ok

3) Fully rebuilt engine so no problems there (runs sensationally)

4) New fuel pump so plenty of fuel

Problem i'm having is that sometimes she sits and turns over for a little while rather than firing up. Could this be CAS or TPS (throttle position sensor)?

Cheers!

Dave

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JimX Grand Master

JimX

Posted
Posted

A lot of them do this, I'm not sure why. Mine goes through phases but other than that it runs perfectly so I just live with it. If it doesn't crank within a couple of seconds, I just stop cranking, wait 1-2 more seconds, then it fires up first kick. Because I know if it doesn't start within 2 seconds, it won't start within 5 :)

Also (could be related) the remote start on my alarm system doesn't always work, like it won't even attempt to start the car. Someone told me once that the CAS has to be in a certain range for it to work, so it'll only work roughly 1 in 10 times depending on where the engine's stopped.

If you have this problem then try my method of starting and see if it improves. If it works then there's probably nothing to worry about.

Edit: Hmm I just remembered Raist60 gave some advice on how to improve starting with a PowerFC setting, and I forgot to try it. I'll give it a go and see if it helps me, but that doesn't help for anyone with a stock ECU.

Bleach1 Proficient

Bleach1

Posted
Posted
Hi all,

Just wondering if anyone could shed some light. Situation is as so:-

1) New plugs gapped to 0.8mm

2) Cleaned and flow tested injectors - all ok

3) Fully rebuilt engine so no problems there (runs sensationally)

4) New fuel pump so plenty of fuel

Problem i'm having is that sometimes she sits and turns over for a little while rather than firing up. Could this be CAS or TPS (throttle position sensor)?

Cheers!

Dave

A common reason for cars needing to crank for a while before firing is either leaky injectors or a leaking fuel pressure regulator, i saw it on a r32 a few weeks ago with a hard start problem, but since you have a newly rebuilt engine it probably istn the problem.

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