Car cuts and turns off during harder(er) acceleration

[graphikg]

If I drive softly, my revs will climb up fine. I only went to 3500 though because of my new clutch and flywheel. However, if I try to accelerate harder my car cuts and turns off at 2500. I drove softly until 3000 and noticed it didnt cut, so I tried to accelerate harder again and it cut and turned off at 3500rpm. I also seem to feel like a loss in power.

What could it be? Fuel pump relay? fuel filter? fuel pump?

[dreamchasin]

Unhook your battery or ECU, whichever is easiest for you. Plug it back in. Start it up and immediately get on it. A buddy had this issue in his m50, it was his ECU.

EDIT: this MIGHT be your problem, but hope it helps.

[graphikg]

Wow I will try it. How long should I have the batt unhooked for?

[mattdk318i]

what engine? im assuming its a 88 M20?

[ZM Blue Devil]

check your ignition wires.

[graphikg]

what engine? im assuming its a 88 M20?

Its an 88 body with an s50 swap.

check your ignition wires.

You mean the coil packs?

[Adrian_Visser]

You aren't still driving around open header are you?

[graphikg]

I am trying to... but it still cuts when I try to accelerate. This problem was there even when my exhaust was connected with the old M50 headers before I changed them to s52 headers.

[graphikg]

I am just wondering... The ecu I have on the car has endured an over-rev. Could it be that it is protecting itself and shuts off even if I just try to accelerate a little harder?

[e46s54dr]

I had a very similiar problem with my m20 and it ended up being one of the ground wires from my started post was loose. I rechecked the wiring and tighten them down and the problem never came back. It may or not be the case for you but it might help.

[dreamchasin]

Wow I will try it. How long should I have the batt unhooked for?

Shouldn't need to leave it unhooked for long at all.

what engine? im assuming its a 88 M20?

This is the 24v swap section...

[328ijunkie]

Engine Ground im betting

[graphikg]

Thanks guys, I appreciate it. Please keep the ideas coming. I am going to try to eliminate some of these possibilities. But also to mention, I do feel a loss in power as far as the motor goes. The motor seems to be less ballsy; and I can get up to about 3000rpm if I go very smoothly through gears. But if I even try to put a little bit of throttle on it, it can shut off even at 2500 or 3000; the shutting off is like the key was just taken out of the ignition while driving. WEIRD!

[Fusion]

I would guess MAF sensor personally.
Tried cleaning the throttle body?

[e30rapidic]

ever resolve this?