TBI bogs out help me

[travis mattson]

Hello
Truck is a 1994 5.7 350 C1500 2wd 4l60E 342 gears . 114,000 miles
Truck is mostly stock, summit 1102 cam edelbrock intake headers no cats

The truck bogs down and stumbles like it's fuel starved. when driving at 30MPH or so and if you excellent hard the engine sputters and bogs and if you mat the gas it cuts out but does not do it parked if you mat the gas

I tried to test fuel pressure with oriellys pile of **** actron tester leaked all over and sprayed fuel 20 feet across the floor so I assumed it was ok.

I replaced fuel pump 10k miles 3yrs ago.
I just replaced the following
Fuel pressure regulator
Injectors
Fuel filter
Plugs
Cap
Rotors
Wires
Vacuum lines
Egr deleted
After the replacing each individual part above and testing after each, THE ONLY THING THAT MADE IMPROVEMENT WAS THE FUEL FILTER.

The following parts replaced 5 years ago at 100k engine swap
Nock sensor
Coolant sensors both
Oil pressure sensor
O2 sensor
I had 1994 350 donor truck and used everything from that. Ecm etc. Truck was a 305

Thank you

 

[travis mattson]

I should add that it appears to be intermittent, more so on colder days

 

[Drunkcanuk]

I had pretty much the same symptoms on my 91. When I finally went to do the fuel pump, it was the little hose in there was full of holes. The one that connects the pump to the hardline. I see you recently replaced the pump. If you didn't replace the line with a ethanol resistant line, may be your problem.

 

[PlayingWithTBI]

The truck bogs down and stumbles like it's fuel starved. when driving at 30MPH or so and if you excellent hard the engine sputters and bogs and if you mat the gas it cuts out but does not do it parked if you mat the gas

That sounds like you're not getting enough fuel, either a weak pump, restriction/leak in the fuel line, or if you're using the PCM from a 305, it's not giving you enough fuel. You need to find out what your fuel pressure is under acceleration. With that cam, you may need more than 13 PSI to make it happy.

 

[travis mattson]

My dad had somebdonthe fuel pump on then 97 I bought from him, he never replaced the hose. I did on the 1997 when I had do again a year later.
I did this on the 94 to 5 years ago because I asked for the line because it didn't come with it. So I used fuel injection hose.

 

[travis mattson]

Using 350 ecm. I should note truck has ran excellent and very strong for 4 years after swap.

 

[travis mattson]

Anyone know if a 6AN fitting will work on the tbi fuel lines for making a inline fuel gauge?

 

[PlayingWithTBI]

Anyone know if a 6AN fitting will work on the tbi fuel lines for making a inline fuel gauge?

There are adapters which you can use.

www.amazon.com/GM-TBI-FUEL-PRESSURE-ADAPTER/dp/B00A8NYAJG/ref=pd_lpo_2?pd_rd_i=B00A8NYAJG&psc=1

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[travis mattson]

Thanks ordered one will see it Saturday

 

[udidwht]

Confirm that the TPS is working properly.