Car holding back on full boost!!
22 June 2003, 06:34 PM
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Yesterday evening my car started acting a little weird. The first thing that happened was that on the motorway when hitting 15.5psi on the boost gauge the car was hold back. It wasn't like a misfire hesitation at all. The knocklink was fine but the Lambda was telling me that it was running lean for full boost as it was only in the orange instead of all the way into the green.
My initial thoughts are that the fuel pump (Walbro) is playing up or that the fuel pressure regulator (standard) has been overpowered and is failing?
Has anyone had a similar problem and can give me any advice?
Thanks
MAFFA
My initial thoughts are that the fuel pump (Walbro) is playing up or that the fuel pressure regulator (standard) has been overpowered and is failing?
Has anyone had a similar problem and can give me any advice?
Thanks
MAFFA
23 June 2003, 06:58 AM
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For the first 5 minutes after starting it seems fine but it does it continuously after that. The car actually went into safe mode the other day for about 5 mins whilst driving 
Might drop Steve a line
Might drop Steve a line
23 June 2003, 08:13 AM
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Be carefull! I have seen that a few times, sometimes a minor problem - solenoid etc but other times it has been the begining of the end for the motor get it all checked asap!
get it all checked asap!
23 June 2003, 11:08 PM
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did yah sort anything this afternoon mate?
will bring the laptop tmrw- but gona have to use dnb's software, as mines a bit un-reliable (at the mo) on pre97's !
Steve
will bring the laptop tmrw- but gona have to use dnb's software, as mines a bit un-reliable (at the mo) on pre97's !
Steve
23 June 2003, 11:50 PM
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Running orange with KnockLink will normally make the car feel quicker rather than slower.
Just to confuse the issue
AC on?
Scares the hell out of me from time to time I can tell you
Just to confuse the issue
AC on?
Scares the hell out of me from time to time I can tell you
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24 June 2003, 12:12 AM
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UK MY95 so no AC
Still not sorted Steve If anything it's worse after checking for boost leaks, putting the re-circ back on, cleaning the MAF, cleaning the solenoid, re-setting the ecu 
It now holds back more & yet the boost now makes it to around 20psi on occasion with no knocking 
It is now not running lean although when it holds back it occasionally drops on the Lambda. I'll show you tomorrow Steve.
BTW what happens when compression is lost? Just sprung into my mind as a thought...not a nice one...but a thought?
MAFFA
Still not sorted Steve
If anything it's worse after checking for boost leaks, putting the re-circ back on, cleaning the MAF, cleaning the solenoid, re-setting the ecu It now holds back more & yet the boost now makes it to around 20psi on occasion with no knocking It is now not running lean although when it holds back it occasionally drops on the Lambda. I'll show you tomorrow Steve.
BTW what happens when compression is lost? Just sprung into my mind as a thought...not a nice one...but a thought?
MAFFA
24 June 2003, 10:44 PM
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Mmmm could have done with that LOL
Well we narrowed it down to ignition or fuelling but the lambda suggested fuelling. We're now narrowed down to the fuel pump (not likely), fuel pressure regulator or injectors. Gonna replace the FPR tomorrow with a spare & see what happens?
Cheers for trying with the laptop Steve
MAFFA
LOLWell we narrowed it down to ignition or fuelling but the lambda suggested fuelling. We're now narrowed down to the fuel pump (not likely), fuel pressure regulator or injectors. Gonna replace the FPR tomorrow with a spare & see what happens?
Cheers for trying with the laptop Steve
MAFFA
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