so my buddy has a 89 ED...and hes got a stock zc in there...when he goes full throttle it loses power/rpms tremendously

any1 kno wat the possible problem(s) could be??

Will it only rev to like 3000 or 3500 RPM? If so try to pull out the ecu fuse and turn the key into the on position, in that order. Leave the key turned over for a minute or two to reset the ECU. Then put the key back into the off position and replace the fuse. This should reset the ECU. I have heard of a few 88-91 Civic doing this and I had a friend refer to it as a cold-start fail safe thing. Although to diagnose the problem I would need to know a few more of the symptoms.

it'll rev as high as u want....until it hits full throttle it flucuates and wont hit rev limiter or anything...

One of these days that i'm free i'll check it out man . . . just remind me

check his timing and ground on the full engine harness

Im having like the same problem. I cant just take off and go WOT or it freaks and bogs out I have to slowly build til about 2500 rpm or 3000 then go WOT.. but the car runs great and quick. I just get whooped on take off cuz of the bogging out..

If u have a Cat, check that first. old cars = clogged cats, if not 3000 to 3500 usually means ecu is in limp mode, switch with known working ecu and see if it straitens up, if not will have to research a little. i would start with cap and rotor, fuel filter, check grounds at thermo housing. check timing, If your running an FPR u may wanna back off the pressure for low rpm power

[quote="ChaosCue"]Im having like the same problem. I cant just take off and go WOT or it freaks and bogs out I have to slowly build til about 2500 rpm or 3000 then go WOT.. but the car runs great and quick. I just get whooped on take off cuz of the bogging out..[/quote

does it miss till 2500 then straighten up on launch, ive gotten a little water in my spark plugs a few times when ive ran around with no hood and it will miss till bout 2000 then get right and it will fall on its face wot on launch.Check plug wires,Spark plugs,Cap,Rotor, time the ZC 16 degrees btdc , what ECU r u using? R u throwin any codes(check engine light)? Check the TPS

i would check timing and the ignitor inside the dizzy

R u throwin any codes? (pull back the carpet and u will see a red light on the ecu, count the flashes.)
0 ECU
1 Oxygen Content
3 MAP Sensor
4 Crank Angle Sensor
5 MAP Sensor
6 Coolant Temperature
7 Throttle Angle
8 TDC Position
9 No 1 Cylinder Position
10 Intake Air Temperature
12 Exhaust Gas Recirculation System
13 Atmosphere Pressure
14 Electronic Air Control
15 Ignition Output Signal
16 Fuel Injector
17 Vehicle Speed Sensor
43 Fuel Supply System