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Author Topic: No acceleration when cold  (Read 4694 times)

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viper

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Re: No acceleration when cold
« Reply #15 on: 24 November 2014, 17:44:45 »
I am in Sunderland :)
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TheBoy

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Re: No acceleration when cold
« Reply #16 on: 24 November 2014, 17:46:52 »
Don't replace the CTS until you have live data off it!!!
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Kevin Wood

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Re: No acceleration when cold
« Reply #17 on: 25 November 2014, 10:17:48 »
Well, if it's any consolation, with a 19 code, the crank sensor was about to let you down, even if it hasn't cured this problem.

As said, you need to get some live data before changing anything else.
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Re: No acceleration when cold
« Reply #18 on: 25 November 2014, 11:38:48 »
I'm confused - I thought the code 19 'incorrect rpm signal' was standard, because the engine isn't running - thought that was the one you ignore? I stand corrected  ???
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chrisgixer

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Re: No acceleration when cold
« Reply #19 on: 25 November 2014, 12:02:29 »
No that's 31 iirc?
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Kevin Wood

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Re: No acceleration when cold
« Reply #20 on: 25 November 2014, 12:19:15 »
Yep, 19 means the crank sensor signal is incorrect. 31 means there is no signal from the crank sensor (not unusual if the engine is stopped). Not really sure why it reports 31 at all. Just adds confusion.
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viper

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Re: No acceleration when cold
« Reply #21 on: 25 November 2014, 19:00:40 »
It is a Bosch crankshaft sensor from the Vauxhall Dealers.

The 19 fault code still remains!

I disconnected the MAF sensor and restarted the car a number of times. This has made the idle at cold better. Re-connect the MAF and the fault remained!

So I bought a replacement MAF made by Cambiare for £144. Again, restarted the car many times to clear everything and when I tried to pull away the car stalled. I managed to re-start it but the power from the engine was very reduced. I suspect the Cambiare MAF is s**t!

The price of a replacement Bosch MAF is the price of a half decent TV!! :'(

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05omegav6

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Re: No acceleration when cold
« Reply #22 on: 25 November 2014, 19:15:34 »
My original MAF went to shit at around 140k, so fitted a sixty quid cheapy from local factors, which managed about 10k, then died...

Refitted original one and been fine for the last 80k... Go figure ::)

Have you tried the original one again?

I also recall something about using the MAF from a 2.5DI Transit :-\
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viper

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Re: No acceleration when cold
« Reply #23 on: 25 November 2014, 19:18:37 »
Tried it again and again comparing it to Cambiare one bought.

Going to let the car cool right down and try again.

It is only from cold that the car idles badly and then has no power when trying to accelerate - best way to describe it is like not pulling the choke out on a manual choke car!

This car is now costing a small fortune to keep going! :'(
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Andy B

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Re: No acceleration when cold
« Reply #24 on: 25 November 2014, 19:25:43 »
Quote from: viper on 25 November 2014, 19:18:37
Tried it again and again comparing it to Cambiare one bought.

Going to let the car cool right down and try again.

It is only from cold that the car idles badly and then has no power when trying to accelerate - best way to describe it is like not pulling the choke out on a manual choke car!

This car is now costing a small fortune to keep going! :'(

and you have tried a new coolant temp sensor  ......  :-\
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TheBoy

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Re: No acceleration when cold
« Reply #25 on: 25 November 2014, 19:52:16 »
2.5/3.0 MAFs are bulletproof (unlike 2.6/3.2), so I wouldn't be changing a MAF without proof.

Rather than randomly changing parts, which is always gong to be expensive and introduce additional problems to complicate the issue, it needs some proper diagnosis.

Do you have the facility to get live data from the engine ecu?
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