Allrite, this one has me stumped. Couple days ago I decided I was going to return my B16 (in my 89 Dx Hatch) back to stock.

I pulled off my Complete IM, consisting of AEBS IM,AEM Fuel rail & FPR,Marshall fuel gaue, 68mm TB.
And put on a completley stock B16A IM.

Now, the car starts up fine, idals fine, and under normal driving. Runs fine.
Once you floor the gas, it falls flat on its face.
At idal, if you hit the gas hard it bogs down and almost shuts off.

I've gone thew double checked the injectors,make shure i didn't clip 2 in backwards, switched out the stock FPR, and doulbe checked all the wires to make shure there not bare in anyplaces or unpluged.Also checked plug gaps & timming. Everything if good.

Anyone have any sugestions to what I might be over looking.

Cliff notes:
Swapped out after markert IM,fuel rail,TB,FPR
with stock parts.
Car boggs and falls flat on its face under WOT.

 

One other thing I just did was put my AEM Fuel rail,AEM FPR and Marshall fuel guage back on to make shure I had pressure ( I do).
I also switched out the TB's to make shure the TPS was good (it is).

I'm Stumped.

 

might have a vacuum leak, check to make sure you IM bolts are torqued down correctly and check for lose hoses. I had the same problem when i switched my IM.

 

Yeah most likely it is a vacum leak the stock studs that hold on th Intk Mani like to strip i would replace them with 12 mm bolts thats what i did. but mostlikely your intak mani is leaking

 

Hopefully thats it. I never thought about that,and thats the only thing I havn't tried. Thanx fellas I'm going to give ita shot.

 

Well I tried tighting the nuts on the IM, an dstarted it back up. Still bogs. I'm out of ideas, and have double.triple checked everything I can think of.

 

did you reset your ecu after the IM swap?

 

if you had a vac leak youd know as soon as you fired it up and it was idleing. thats when vac is the highest. could the ecu tune be off? goodluck

 

ECU was reset. going to try another ecu. this is getting fustrating.

 

same problem here

 

I tried a diffrent ECU, still bogs.

Now I'm just looking at the problem as "WHY IS IT BOGGING", other than, it started doing it after the IM switch.

 

anyone

 

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Is your throttle cable adjusted properly?