An update on my starting/bogging issues

[FormulaSlickG94]

Decided to finally install the Walbro fuel pump in via the trap door method with my dad over the weekend. After installing the new pump...the car started perfectly fine...not like before where it would crank and crank. That problem is addressed. The car also accelerated a lot smoother.

But...after the car heated up...it started bogging again when I give it some gas so the fuel pump was the starting issue...but unrelated to the bogging issue.

After the car heats up it, when I give it some gas the thing starts bogging, then stops bogging and gets back on eventually if I let off the throttle a little. If I baby foot the gas it doesn't seem to bog. Could I be looking at an electronic issue instead of fuel related?

[TraceZ]

Decided to finally install the Walbro fuel pump in via the trap door method with my dad over the weekend. After installing the new pump...the car started perfectly fine...not like before where it would crank and crank. That problem is addressed. The car also accelerated a lot smoother.

But...after the car heated up...it started bogging again when I give it some gas so the fuel pump was the starting issue...but unrelated to the bogging issue.

After the car heats up it, when I give it some gas the thing starts bogging, then stops bogging and gets back on eventually if I let off the throttle a little. If I baby foot the gas it doesn't seem to bog. Could I be looking at an electronic issue instead of fuel related?

Is the throttle body clean? Try removing it and taking it apart and de-gunking it really well. I once had dirt in the Idle Air portion of the TB cause bogging when coming off idle.

[Fastbird93]

I've been having the EXACT same problem. Fine when cold, bogs down for a second before picking up once the car starts to warm up.

What are your fuel trims doing?? I'll let you know that I've diagnosed EVERYTHING, except the fuel injectors for balance/mechanical issues other than leaking, and haven't fixed it.

[FormulaSlickG94]

Thanks for the responses...

I actually had 8 new fuel injectors put in because of leaking about 6k ago and that wasn't the problem either. The opti only has 20,000 miles on it, the plugs/wires/and coil only have about 7k or so on 'em. Could I have fried the opti already again?

Haven't tried O2 sensor, Throttle Position sensor, Fuel Pressure regulator yet..those on the list

[Fastbird93]

Thanks for the responses...

I actually had 8 new fuel injectors put in because of leaking about 6k ago and that wasn't the problem either. The opti only has 20,000 miles on it, the plugs/wires/and coil only have about 7k or so on 'em. Could I have fried the opti already again?

Haven't tried O2 sensor, Throttle Position sensor, Fuel Pressure regulator yet..those on the list

Been there done that.

Opti, good
Coil/Ignition, good
TPS, good
IAT, good
Coolant Temp Sensor, good
O2's, good
Plugs, good
Wires, good
ICM, good (spaced or not spaced, made no difference)
Computer, good
Tuning, made no difference
FPR/AFPR, good
New Shortblock, problem is still there

It's a mystery.

[TraceZ]

Is the throttle body clean? Try removing it and taking it apart and de-gunking it really well. I once had dirt in the Idle Air portion of the TB cause bogging when coming off idle.

Has anyone with this problem tried removing the Idle Air Solenoid and cleaning up the passages behind it with the throttle body apart? I had a bad stumble in a 1995 Z I used to own, and cleaning that up got rid of it completely.