ok ive been researching trying to find out what is wrong with my teg b20vtec. i have lost power and acceleration is weak. the car now sounds like its a freakin subaru and i hate it. i have changed out the plugs, distributor rotor, distributor ignition coil and the fuel filter and it still does it. does anybody know what i am talking about? help is really needed.

 

check your timing?

 

what would cause the timing to change? what started this was me driving it and then someone tried racing me so i down shifted and hit the gas. after slowing down it started making the noise and loss of acceleration and power. would that still cause the timing to be off?

 

maybe a bent valve...i know downshifting is fun and all but sometimes it isn't worth it.

 

I am willing to bet that there are missing teeth in your timing belt...or more than one bent valves.

 

Either bent valve, a piece broke off an exhaust valve, timing belt jumped a tooth or a couple teeth, or you are missing teeth on the timing belt.

 

I'm gonna go with bent valve!

 

compression and leak down test...

 

compression test first. if you find a low cylinder, leakdown test.
if all cylinders are low, check timing

 

timing should be checked before both of those tests lol...

 

ide say bent valve aswell, ya and i agree with highwey downshifting is fun but not the best thing to do for ur car

 

not necessarily, as a compression test will tell you 2 things at once: possible bent valve(s), or possible skipped timing

 

whats the compression? b20's tend to crack sleeves when abused.

 

Lets stereotype^^ I love when members assume that B20's sleeves aren't as strong as other VTEC/Non- VTEC blocks, yet people make amazing power on stock sleeves. What ecu are you running on this setup? Do you have an actual tune?

 

Whatever you say chief.

 

which block? b? or z?
what i mean is, were they the p3f pistons? or phk? is there a knock sensor on the back of the block?
regardless, compression test will guide you on your next step towards diagnosing the issue

 

This! Check for proof on the All Motor Forum.

 

what is your setup piston etc..,
any check light ?
check your tps sensor , fuel pump and injectors

 

Are you one of those people who had a bad experience with an B20V setup? Oh let me guess, you have NO experience but a friend of a friend of a neighbors cousins built a B20V, beat the **** out of it and it blew up. Thus, leaving a bad taste in your mouth, through no real experience... am I close? Regardless, you have no idea what you're talking about. I built a B20V in which I had a great experience, made good power and didnt crack a sleeve.

As for the question at hand: check timing first and foremost. Also, spill the beans on your setup. We need to know as much as possible to really help you out.

 

At least I am not the only one in this thread that knows what they are talking about . And to the OP; check your mechanical timing as Cpt stated, you may find a couple of surprises.