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Combo van cuts out

Posted By Chriz1 Wednesday, May 01, 2019 5:01:58 PM
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Chriz1
 Posted Wednesday, May 01, 2019 5:01:58 PM
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Hi

I'm having a problem with my vauxhall combo 1.7 cdti z17dth. When left for a day or so, always when starting from cold. Van will fire up great when I drive away within 200yard it just cuts out. Will take a.but of turning over to fire again but will be fine then drives well. Never happens when warm or hot.
So far changed scv,maf,fuel filter checked for leaks opcom not showing codes, and furl pressure looks good.
Any ideas?
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 Posted Wednesday, May 01, 2019 5:07:34 PM
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Hi C,

When you say fuel pressure looks good.
What do you mean?

Can you give us some data - when it doesn't start during cranking what is the fuel pressure?

Plus age of van and a bit more detail on any testing you have done?

Ive got lots of ideas but they won't help you...Smile


Mt

I O, I O, its off to work I go!
Chriz1
 Posted Wednesday, May 01, 2019 5:19:40 PM
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Hi She's covered 128k, 2006.
I have cleaned fuel pick up, checked fuel lines for leaks, going to change leak off pipes next but look ok
Cleaned and changed fuel filter and housing, cleaned egr and blanked ( was doing this before blank) checked visually wiring, just don't get it.
Only other issue I have never sorted is a proper jumpy throttle pedal, say in traffic it hard to be smooth van lunges forward etc but it's been like this since I owned it 2 years.

It starts fine always does, but I drive away and as soon as i give throttle some pressure cuts out. No stuttering just cuts.
But it is very random doesn't always happen.
Cranking fuel pressure initially is 100bar then rises to 300bar.

Drives really well
Wednesday, May 01, 2019 5:23:45 PM by Chriz1
McTech
 Posted Thursday, May 02, 2019 4:59:45 AM
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Chriz1 (5/1/2019)
Hi She's covered 128k, 2006.
I have cleaned fuel pick up, checked fuel lines for leaks, going to change leak off pipes next but look ok
Cleaned and changed fuel filter and housing, cleaned egr and blanked ( was doing this before blank) checked visually wiring, just don't get it.
Only other issue I have never sorted is a proper jumpy throttle pedal, say in traffic it hard to be smooth van lunges forward etc but it's been like this since I owned it 2 years.

It starts fine always does, but I drive away and as soon as i give throttle some pressure cuts out. No stuttering just cuts. But it is very random doesn't always happen.
Cranking fuel pressure initially is 100bar then rises to 300bar.

Drives really well


Can you graph the fuel pressure PID when the car is reluctant to start and post a screen shot here.
Also when it cuts out under throttle application.

I don't know these particular engines that well - but there known faults with the HP pump and PCM's

Also can you do a leak off test.

The only way we can help from this distance is with detailed testing and test results. i.e. good Data to analyse.

Mt


I O, I O, its off to work I go!
Chriz1
 Posted Thursday, May 02, 2019 6:14:11 AM
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I will get some data uploaded thankyou for your help
stevieturbo
 Posted Sunday, May 05, 2019 5:02:30 PM
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datalog to see if crank//rpm signal is lost when it cuts, or if some other aspect is getting lost.

Really there should be only a small few number of things that would cause a total instantaneous engine cut, which is what you seem to be saying is happening.

I've over 700k on mine and never had any issues like that, great vans and great engines.

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