gamellott

Citron, Tune up was plugs, fuel, air filter and timing belt replaced immediately after I bought it. Engine timing was also adjusted. The Misfire is only at RPMs lower than 2000 and accelerating, in 3rd, 4th or 5th gear. It's normally not running that low of an rpm, but it is on occasion. That's the only consistency. I can sit and idle forward in traffic on level ground and it runs fine. I'm really wondering if this is a normal thing with these engines and Just Maybe I need to use a higher octane fuel to prevent it, it's NOT a knock like my motorcycle does running on low octane fuel. When I had the cap and rotor off, It appeared firm and It doesn't appear to have a centrifugal advance like older vehicles do which would throw the timing off. The misfire definitely goes away at higher RPM and gets good power once over 2000. If I'm light on the pedal to accelerate, it doesn't misfire. If I'm heavy on it, it will. Makes me wonder if one of the injectors could have an issue....

My 92 is the first VG30, and I have had this nuance ever since I've owned it and I've learned to just not lug the engine and accelerate. Other than that, it seems to drive fine. I've had it for 2 1/2 years. It's had a tune up and routine oil changes. Nothing significant has been done to the ignition or fuel system. Is this something that everyone else seems to experience or is there something that could be failing??

There could be an issue with your brake booster killing your idle when you step on the brake. Also, If you have working AC; there is a solenoid that kicks up the idle speed when the compressor kicks on that could cause a similar issue.

I'd wonder if your brake booster has developed a bad leak. Does it return to a normal idle after you take your foot off of the brake?? Anytime you press your brakes with a vacuum brake booster, it will affect your idle some, It shouldn't almost kill it. Also, there is a solenoid that kicks the idle speed up a tad when your AC cycles. If that's not working, it could cause a similar issue.

Had a 95 D21 for 12 years, and 130k miles. Sold it, went overseas, came back and bought 92 WD21 for almost 3 years now, that now has over 300k miles. Can't tell you what's original, but it still runs like a champ and almost everything seems to be in good working order after a Lot of elbow grease and Seals.

Crickets.... I am wondering the same??