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Great wall v200 only 2 injector pules when cranking than none..

  • zac grubb
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6 years 1 month ago - 6 years 1 month ago #33195 by zac grubb
Great wall v200 only 2 injector pules when cranking than none.. was created by zac grubb
Great wall v200 new pump and injectors...

Wouldnt run with out aerostart helping start..

Came from another shop

Done injectors as flow back was erratic...

started ran all good... cut out like out of fuel..

No fuel pressure.. tested everything i could

Got a new pump.. got pressure back..

Smokes slighly on cranking but only 2 earth side switched pules each crank so it wont fire wont run...

What next.... tested 5v ref etc computers alive... key on 2.2v to injectors.. scope it and crank resembled a good injector wave form up to 12v
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Last edit: 6 years 1 month ago by zac grubb.
The following user(s) said Thank You: me

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6 years 1 month ago #33320 by guafa
Replied by guafa on topic Great wall v200 only 2 injector pules when cranking than none..
Hi zac.

I am supposing the picture is for one of your "good" injector signal. That seems also erratic.

I think is not a problem that power only appears when cranking (i have seen it before).

Which i see a little strange is that injector is not firing at the same frecuency (which makes me think pcm is not "seeing" crankshaft position.

Have you checked ckp sensor signal at pcm?

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6 years 1 month ago #33327 by John Curtis
Replied by John Curtis on topic Great wall v200 only 2 injector pules when cranking than none..
Can you scope cam/crank correlation and post it?
Making Pressure Differential Sensors (PDA Sensors) for pressure pulse diagnostics.
Currently servicing Central Texas.

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5 years 6 months ago #38688 by Brownie777
Replied by Brownie777 on topic Great wall v200 only 2 injector pules when cranking than none..
I have the same issue. What was the outcome?

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5 years 6 months ago #38690 by Brownie777
Replied by Brownie777 on topic Great wall v200 only 2 injector pules when cranking than none..
I changed crank and cam sensors with known good ones aswell but still no joy. Runs on aerostart. Just stops pulsing after 2 blinks

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3 years 3 months ago #56880 by Amatoautos
Replied by Amatoautos on topic Great wall v200 only 2 injector pules when cranking than none..
If you have put new or 2nd hand injectors in you need to code them first

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