considering more then 1 shop has tuned it and that link has no relation to the issues he is having, i would disagree.... as a matter of fact, you do realize that this issue existed BEFORE it ever came to our shop? This happens when you go to accelerate from ZERO MPH to 5mph... this has NOTHING to do with breaking up under boost etc...
04 Cobra running bad. PLEASE HELP!!!!!!
- Thread starter modular89
- Start date
considering more then 1 shop has tuned it and that link has no relation to the issues he is having, i would disagree.... as a matter of fact, you do realize that this issue existed BEFORE it ever came to our shop? This happens when you go to accelerate from ZERO MPH to 5mph... this has NOTHING to do with breaking up under boost etc...
it says it does it under boost here.
04Cobra85 I will give you a call tomorrow. I am gonna add some more ground wires this week and see. I have moved the battery to the trunk so I will add some more. Bridge Racing timed the cams again the second time as well.
Oh and the compression test was done on a warm engine
That means it would be even worse on a cold engine.
The whole thing sounds extremely odd and I would really like to know what the cam timing is as well.
Kurgan tried a different ecm while he had the car.
as i stated, i have tried so many things it's not even funny...
between bart and me, we have over 40yrs experience with mustangs... and then throw BB&T into the mix... thats alot of experience troubleshooting... hence, why i believe there is an electrical gremlin
between bart and me, we have over 40yrs experience with mustangs... and then throw BB&T into the mix... thats alot of experience troubleshooting... hence, why i believe there is an electrical gremlin
I had the same issue. I had a glenns Performance triple walbro setup. Turns out one pump had died. It was creating all types of air in the lines because the other two pump were pushing fuel back through the dead pump. My fuel pressure always remained normal, even with the dead pump.
I have sent the pumps back to Glenns Performance and they sent me 2 new ones and I also upgraded to a larger Magnafuel regulator.
The pumps have their own relays. I have a return style fuel system so all the factory stuff is gone.
Same issue I had from what it sounds like. Check those sparks man, mine was wrong size from dealer :/
Well my alternator went out so I had to replace it. I was hoping that was the problem but it is still there. I had a fellow svtp member look at it for me and we noticed that the fuel system sounds like it either has air or is pulsating. You can only feel it and hear it in the return line. He had 3 other cobras at his house and none of them had this sound. I am wondering if my pumps are not big enough for my fuel line setup. Maybe they are not able to give the volume. The fuel pressure was not increasing as boost kicked in. I just wonder if I need bigger pumps than the 2 walbro???????????
It's return style so it's 100% all the time.
This is a problem.
You must have and use a boost reference fuel pressure regulator. As boost goes up then fuel pressure will go up 1psi for 1psi.
There should be a nipple on the regulator that you need to hook up to the intake track Post blower(where boost pressure occurs).
You set your base pressure with the key on and the car off at x psi. As the car pulls vacuum or boost then the reference port helps adjust the fuel pressure accordingly.
I have a magnafuel boost regulator part number mp-9950-b. It is supposed to support 2000hp.
"Power ratings are for naturally aspirated engines running gasoline."
I would double check the reference line and make sure all routing to the regulator is correct and fix that problem.
Users who are viewing this thread
