Questions on lower boost - Ford Powerstroke Diesel Forum
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Old 02-17-2014, 12:04 PM
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Questions on lower boost

97 F350 Cali with stock injectors, 3.55 gearing, 5spd trans, 315/75/r16 tires. I believe it has some aftermarket single stage chip in it, 75 HP IIRC. Also have an intercooler, intake, exhaust/downpipe, electric fuel and 1.0 housing with new up-pipes, ebpv deleted. Map line moved to hot side IC pipe. Fuel pressure stays at 65 idle or WOT.

I'm trying to figure out an issue with seemingly low boost. I went ahead and made a pressure tester and found a couple of boost leaks at my IC pipes, and compressor outlet. Fixing those helped a good bit. But I am making about 15-18 PSI at wot in 3rd. If I go for fourth the boost drops off.

I've taken some AE data logs and am trying to see if they tell me anything.

These are averages at idle:
APP %-18.62
APP Volts- 0.92
Baro- Stays at 4.35
Engine RPM-683
EBP PSI-13.83
ICP Volts-0.76
MAP PSI-14.04
ICP DC-10.60

Thanks guys
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