Need help, car = slow

[M4G1K M4N]

ok... so my 91 accord with a f22a1 (with port and polished head, a4 headers aem cold air, p12 ecu) doesnt pull.

it will accelerate but kinda slowly, like we have a 89 prelude with stock b20 and that pulls alot harder.

also first start up is tough for it but after its started it runs fine. its also making a crazy grinding type noise that just started making the noise 3 days ago and i cannot fine the problem.


anybody know what the problems could be??

[deevergote]

Who did the head work? Did they know what they were doing? If it wasn't properly ported, and just hogged out, then you may have lost power. Bigger isn't always better. Flow velocity and proper mixing are essential.

You're running a stock cam, stock P12 ECU, stock A4 header, (stock exhaust?), and a P&P'd head... You really should have an upgraded cam, better header (there aren't many worthwhile options for us, other than the Bisimoto header), 2.25" or 2.5" exhaust,and a tuned ECU.

[PUMASTi]

When did the problem start. Before or after the port and polish and the p12??

Deev your sig is huge change it or I'll delete it.

[xfactortype1]

sound like what beavergote said woops deevergote said..

they probably didnt do it right and your not getting compression. hope its not your head gasket. eitherway it doesnt sound good. hopefully they torqued the head down properly?


later x

[deevergote]

If its the head gasket, or the head is warped, coolant will be mixing with the oil or getting in the combustion chamber. You'll have chocolate milk in the crankcase, and/or you'll be blowing white smoke.



And my sig is 300 pixels shorter than the maximum width, and EXACTLY at the maximum height

[M4G1K M4N]

the head was ported by one of my friends goin to wyo tech or one of those tech schools majoring in automotive performance.

and yes everything else is stock in the engine. im planning on getting bisimoto stage 2 cams sometime soon.

either that, im goin to sell me cb7 and try to get something rear wheel drive.

[maney77]

damm

yo i would of taken the head to a speed shop and had them done the work like an experienced PRO would off done. you cant just give someone a part a big part of your engine to just anybody, trust me i've learnd the hard way and it wasn't cheap.

[deevergote]

If he didn't know what he was doing, he may have just hogged out the ports... that would kill any hopes of performance from that head.

[1990Ex]

buy a new head dude

[deevergote]

... and have that new head dude properly modify a new head for you

[1990Ex]

... and have that new head dude properly modify a new head for you

x2

[M4G1K M4N]

well i got the head for free with my new engine. so no big deal.

i was just wondering what the problem was.

thanks everyone.

[deevergote]

That may not be it... but it's a possibility.

[M4G1K M4N]

well maybe ill throw on my stock a4 head on it?

see what happens and see if it got torque and power again.

[wed3k]

why do you need a port and polished head when you have nothing done to it? it should be one of the last things done to a cylinder head because once you change the powerband and camshaft, it all changes how you want the port design/flow to be.

the only thing that helps is if you you gasket match, blend in the seats and do some better combustion chamber work. id rather spend time on a valve job than a port and polishing on a stock head.