S/C IN AND IT IS SURGING
01-31-2008, 03:33 PM
#31
Race Car
Thread Starter
I'll talk to Firemed seems I have 1/2 his car on mine as it goes 
I'm going to take my time it must be something I caused either an air or fuel issue. Wish me luck !
I'm going to take my time it must be something I caused either an air or fuel issue. Wish me luck !
01-31-2008, 03:42 PM
#33
Race Car
Thread Starter
Update:Motor cold FMU installed
Fuel pressure is only 32 Psi when I increase the speed it does not rise, slight drop to 30 Psi than to 32 psi.
Mike is bringing up the Maf to act as a back up.
Fuel pressure is only 32 Psi when I increase the speed it does not rise, slight drop to 30 Psi than to 32 psi.
Mike is bringing up the Maf to act as a back up.
01-31-2008, 03:50 PM
#35
Three Wheelin'
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Location: In the boatyard installing the mast and engine, we don't need a crane, we harness the mesquito's! Yeah!
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So sorry - never tell a sailor he can take a shower and use as much water as he wants
I'll still be able to drive up there?
See ya in the morning
Chips....
check....
computers...
check.....
MAF.....
check....
engine....
check....
wouldn't this be easier to install it on MY car?
I'll still be able to drive up there?
See ya in the morning
Chips....
check....
computers...
check.....
MAF.....
check....
engine....
check....
wouldn't this be easier to install it on MY car?
01-31-2008, 03:52 PM
#36
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With the car running and the vacuum lines to the fpr and fmu disconnected, what is fuel pressure. Stock is 36psi. Idle with the vacuum attached should be ~6 lower.
01-31-2008, 03:54 PM
#37
Race Car
Thread Starter
With vacuum off the FPR it goes to 40 PSI
I think I may have found the issue, The plastic vacuum line I treaded off of the fuel dampener is loose on the hose, pulled off real easy this goes to the FMU, keeping my fingers crossed and getting a new line in a few.
I think I may have found the issue, The plastic vacuum line I treaded off of the fuel dampener is loose on the hose, pulled off real easy this goes to the FMU, keeping my fingers crossed and getting a new line in a few.
01-31-2008, 04:31 PM
#38
Supercharged
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Water bill....
Boost...
Water bill....
Boost...
Water bill....
Boost...
Water bill....
Boost...
Water bill....
Boost...
Water bill....
Boost...
Water bill....
Boost...
Water bill....
Boost...
decisions!
Boost...
Water bill....
Boost...
Water bill....
Boost...
Water bill....
Boost...
Water bill....
Boost...
Water bill....
Boost...
Water bill....
Boost...
Water bill....
Boost...
decisions!
01-31-2008, 05:08 PM
#39
Race Car
Thread Starter
Boost it is:
I need to rent a Ditch withch on Sat and dig up 150 of my front yard so it will have to wait till Sat, car comes first!
I have a leak somewhere off of the spyder I can blow air in the line and hear it, thats sucks.
I need to rent a Ditch withch on Sat and dig up 150 of my front yard so it will have to wait till Sat, car comes first!
I have a leak somewhere off of the spyder I can blow air in the line and hear it, thats sucks.
01-31-2008, 05:24 PM
#41
Why are the pipes under your yard your responsibility?
01-31-2008, 05:27 PM
#42
Race Car
Thread Starter
Our county says it's my problem from the meter back:
I my be chasing a ghost it seems like when I blow on the vacuum line after looking at the diagram it goes to the TB and I guess I should be hearing air, am I right?
I my be chasing a ghost it seems like when I blow on the vacuum line after looking at the diagram it goes to the TB and I guess I should be hearing air, am I right?
01-31-2008, 05:43 PM
#43
Supercharged
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Think of 928 ownership as Fight Club.
"The first rule of Fight Club is there is no Fight Club!"
Never... I mean ever! Never add up the receipts!
"The first rule of Fight Club is there is no Fight Club!"
Never... I mean ever! Never add up the receipts!
"Budgets? Where we're going we don't need budgets!"
01-31-2008, 06:33 PM
#45
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Sounds like the FPR is working as it should.
From what I gather, the car shows a lean condition whenever you accelerate. Does this happen at any acceleration or does it only happen when the car is seeing boost?
If it is happening whenever you press on the accelerator pedal then it has nothing to do with the SC system. The computer is not giving you acceleration enrichment so that tells me it does not know to give enrichment until after the event and the o2 sensor comes into play. It would be reasonable to expect that to cause surging. I suspect the MAF is not working properly because that is what tells the LH acceleration has taken place and to provide more fuel.
Mr. Speak may have an opinion on that being a possibility.
From what I gather, the car shows a lean condition whenever you accelerate. Does this happen at any acceleration or does it only happen when the car is seeing boost?
If it is happening whenever you press on the accelerator pedal then it has nothing to do with the SC system. The computer is not giving you acceleration enrichment so that tells me it does not know to give enrichment until after the event and the o2 sensor comes into play. It would be reasonable to expect that to cause surging. I suspect the MAF is not working properly because that is what tells the LH acceleration has taken place and to provide more fuel.
Mr. Speak may have an opinion on that being a possibility.