I recently had a b16 installed (in 90 civic si), but I experiance a similar thing on my d16a6 too. With the b16, it happens more in 2 places: 1)when I'm cruising at 3k rpm in 4th or 5th, just giving enough gas to stay at same speed and 2) when I get on it at around 5000 rpm. Now you should know that I'm getting a code 21 (vtec solenoid), so the check engine light is on (and I have no vtec activation of course). What I experience is the engine coughs once (makes the car slightly buck due to sudden deceleration) and the check engine light goes off simultaneously and comes back on 2 secs later. What could this be? I'm replacing the fuel filter this weekend just because. Any other ideas? Thanks.

 

I am having a similar problem on my D16Z6. My car had trouble starting this morning. But for the past couple of days, my car would jerk from the engine dying for a fraction of a second, then coming back while cruising. The other day I opened the throttle to pass someone, and it felt like it hit the rev limiter on my msd, except it was only at 4200 rpm. I have a feeling it is the distributor, but cannot be sure yet. I made a post about it (civic si wont rev high any more) but am still awaiting responses.

I do not have a CEL though.


[Modified by Dokta, 4:24 PM 4/24/2002]

 

check for vacome leak and do a spark test and check you plugs gap.

 

give it some Robitussin

timing?

 

'tussin does cure all...but your timing sucks

seriously, thanks for the comments. It seems to be happening more often now, but maybe I'm just paranoid. I havent driven it too hard yet either, and I'm afraid to. I'm wondering if it's because the vaccuum line on my T/B was broken off. That would be cool because I have a new one on the way anyway.

 

if it happened with the old motor too
check fuel pressure. it could be a clogged fuel filter or a pump going bad.