Mham2k
15+ Year Contributor
- 306
- 57
- Feb 8, 2008
-
Dallas,
Texas
So I have had lots of issues tuning issues with be idle so I forced the car to stay in open loop, then magically my issues were fixes I thought.
Fuel: e85, rest is in my car bio
This.workednfor.about 30 minutes, Idle is fine but when I drive the car sputters and goes lean.
Test #1: Over compensate global fuel. This worked for a few miles then guess what, sputtering again.
Test #2: Raise fuel pressure, same thing raise it 10 psi from 43.5. then guess what worked for a while then stopped.
Test #3: Pressurize fpr to see if it raises, yep it raises. Not sure if it is 100% 1:1 but it definitely made the fuel pressure go up.
Test #4: Boost leak test, I only get 13psi when testing at throttle body and hear air coming through the crank case and out.the dipstick. PCV is fine, I assume this was due to it being a new build with about 60 miles on it, rings probably aren't sealed yet. I don't have any smoke coming out of the exhaust. There is some air coming from the top of the fpr, I put Teflon tape on it but need to do another boost leak test to verify it worked. No air coming from anywhere else.
Test #5: Pull the fuel pump and inspect. Not done yet, will do soon
Test #6: Pull and test injectors
No matter what tune is in it, no matter what glob fuel, no matter what I do with the software there is something mechanical wrong. Before I go buy a new pump or a new fpr I would like some smart people to give me some more thing I can test.
It's either a problem with the pump (aeromotive ), the fpr, or a vacuum leak somewhere that I can't find.
Any ideas?
Fuel: e85, rest is in my car bio
This.workednfor.about 30 minutes, Idle is fine but when I drive the car sputters and goes lean.
Test #1: Over compensate global fuel. This worked for a few miles then guess what, sputtering again.
Test #2: Raise fuel pressure, same thing raise it 10 psi from 43.5. then guess what worked for a while then stopped.
Test #3: Pressurize fpr to see if it raises, yep it raises. Not sure if it is 100% 1:1 but it definitely made the fuel pressure go up.
Test #4: Boost leak test, I only get 13psi when testing at throttle body and hear air coming through the crank case and out.the dipstick. PCV is fine, I assume this was due to it being a new build with about 60 miles on it, rings probably aren't sealed yet. I don't have any smoke coming out of the exhaust. There is some air coming from the top of the fpr, I put Teflon tape on it but need to do another boost leak test to verify it worked. No air coming from anywhere else.
Test #5: Pull the fuel pump and inspect. Not done yet, will do soon
Test #6: Pull and test injectors
No matter what tune is in it, no matter what glob fuel, no matter what I do with the software there is something mechanical wrong. Before I go buy a new pump or a new fpr I would like some smart people to give me some more thing I can test.
It's either a problem with the pump (aeromotive ), the fpr, or a vacuum leak somewhere that I can't find.
Any ideas?
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