Hi, i have an 89 Civic LX,the only changes done to the motor is a header and a custom exhaust, short ram intake. The motor (for now) is a D15B2 w/ Dual point injection.

For a while now my car off and on would bogg at high rpm's. Sometimes it would go to the Rev limit and kick back, other times it would get close and hold but loose power. Then 2 weeks ago i noticed the bogging starting earlier closer to like 4800-5000 rpms. This past it starting just bogging anytime it got close to 3000 rpms, maybe even less. If i hold throttle, while car is in neutral, it will continue to weaken to the point of stalling out. It also makes a loud growling noise, and a hissing noise. I also noticed before it got this bad that going up hills the car would begin to loose power also. If i hold my hand near the intake filter while it's under throttle it pulsates, like the air it is being forced away from the filter, or that the suction isn't consistant so the pulse is felt from the air being sucked in on and off again creating a vaccum wave. I've also noticed a strong gas smell, like the gas isn't being burned up, but theres no smoke coming from the exhaust. The computer is throwing no codes at all.

I went ahead and replaced the spark plugs, the cap and rotor. The plug wires where just replaced a month ago. I've checked for spark at all 4 plugs, which there is. When i pulled the plugs they were black, also 2 of them had a brown ring on the porcelin where it meets the metal. The cars tempature gauge never changes stays where it's suppose to be. I then checked the distributor. First i noticed damaged to the cap, also the rotor had bored out it's screw hole causing the rotor to have play damging itself and the cap. Literally chunks of plastic where missing. Replaced those parts and the car idles beautifully. But continues to bogg when throttle is applied.

I'm not sure where to go from here. I'm going to try replacing the plug wires and distributor next.
Could a gasket, such as a rotted TB or Manifold gasket cause this kind of problem. Creating excessive air smothering the motor?
I could use any help I can get . I moving in 2 weeks and this car has to drive almost 1000 miles to get me there. So time is a factor also.

Thanks-Jason

 

Bump

 

I forgot to mention that the head appears to be heating up alot, the whole inside of the head is a deep gold to light bronze color. Also the valve cover inside top is black like oil is cooking on it. But my car temp gauge never says tha cars running hot. So is it possible the heads over heating w/ the car registering it?

 

from what you are saying it sounds like your catalytic converter is pluged .you can pull out your o2 sensor and drive it and see if it is any better


Modified by jonsswapshop at 11:11 PM 9/19/2005

 

I would try the TPS sensor.