FlipDowt

i have a 1994 prelude


i had a so called "Honda Expert" swap out my stock engine (f22a1) with a VTEC (h22a).
3 days turned into 6 weeks and finally got the car back only to find out it was running really rough.

Idiot toothless jackass mechanic put in new timing belt, water pump, plugs and cap. (the wires we not changed because he said they looked good). He also hooked up the 3 extra wires and the VTEC kicks in at 5000 rpm, so i know that's right.

brought it to a new mechanic.
He checked it out and says it has:
- great compression
- igniting fine
- has injector pulse at fuel injectors
- no noise in valve train
- spark detonates fine

the problem is that it idles roughly and surges while idling. Attempts to adjust the timing make it run rougher. When driving under 60, it kinda lurches like it has a blown valve.

The new mechanic (with all of his teeth) says he thinks that the idiot toothless jackass mechanic did not install the timing belt properly, but suggested i run this by you folks to see if you have any clue on how to solve this before we have to strip it all down again.

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boyasaurus

vtec suppose to kick in @5500rpm. check the vacuum diagram under your hood see if the sticker is still there. make sure those are correct. If he install your timing belt wrong. switch sides, then time it. it can also be your IACV. also what kind of engine harness and ecu youre running?

FlipDowt

The engine Harness is original ( he ran some extra wires) The ECU is for a '94 Vtec
Yeah, I meant 5500RPM

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boyasaurus

go look at your new ecu, is it p13 AT or p13 MT?

Edit - reason why i asked you this is because when i had my complete swap. i had the same symptom as you.

We couldnt figure it out. So I try my friends ecu out. also have a h22a swap. I looked at mines. Mine was AT ECU. His ECU was Mt which ran fine for mines.

Smoothrigoletto

make sure the mechanic lined up the oil gear appropriately during timing belt install, H22s are notorious for this. Oil might not be pumping correctly is my guess? Also if you have another at hand, try to see if it is the fuel regulator. Recheck your air hoses are correctly placed. And by the way Vtec should come in at 5100RPMs for a stock ECU. Hope this helps.

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"Prelude is just like a snow leopard. Though it is rare, yet its elegance is unmatched. If you own one, you should be a proud driver forever" (http://www.tunedautos.com/honda-prelude-tuning).