I got my engine back in after my rebuild, and it started right up. It idles great but when I give it gas it stumbles and backfires a bit, and wont rev past 1200 or so. If I slowly push the gas a little bit it will rev all the way up.
A little background - I've been slowly chipping away at my 97 restoration. just about everything new under the hood including brand new wiring harness. All parts painstakingly disassembled and cleaned. All rubber hoses replaced with new OEM. Tank pulled and completely de-rusted, you could eat off it. New Denso fuel pump. New fuel filter. Timing dead on 3° BTDC. New distributor wires, plugs, everything, all OEM. Fuel injectors serviced by witchhunter.
Fuel pressure relay tested ok. Fuel pump voltage reads hi and lo as it should at the fuel pump connector.
I thought it may be the TPS but when I pulled the plug on it it still had the problem, so thinking I can rule that out. I don't have a vacuum pump to test/adjust the TPS. I did remove it when rebuilding and didn't mark it's location so it is most likely out of adjustment. I've moved it a little here and there and it hasn't affected much.
I was getting some vacuum (or maybe pressure, couldn't tell for sure) in the fuel tank, probably due to the charcoal canister (not replaced) so I tried opening the gas cap. No change.
It seems to be fuel related, but I don't know for sure.
I'm stumped and need suggestions. Any help is greatly appreciated!
A little background - I've been slowly chipping away at my 97 restoration. just about everything new under the hood including brand new wiring harness. All parts painstakingly disassembled and cleaned. All rubber hoses replaced with new OEM. Tank pulled and completely de-rusted, you could eat off it. New Denso fuel pump. New fuel filter. Timing dead on 3° BTDC. New distributor wires, plugs, everything, all OEM. Fuel injectors serviced by witchhunter.
Fuel pressure relay tested ok. Fuel pump voltage reads hi and lo as it should at the fuel pump connector.
I thought it may be the TPS but when I pulled the plug on it it still had the problem, so thinking I can rule that out. I don't have a vacuum pump to test/adjust the TPS. I did remove it when rebuilding and didn't mark it's location so it is most likely out of adjustment. I've moved it a little here and there and it hasn't affected much.
I was getting some vacuum (or maybe pressure, couldn't tell for sure) in the fuel tank, probably due to the charcoal canister (not replaced) so I tried opening the gas cap. No change.
It seems to be fuel related, but I don't know for sure.
I'm stumped and need suggestions. Any help is greatly appreciated!
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