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12 Posts
Hello,
New to this forum but from what I can see there are a lot of knowledgable folks here.
I recently purchased a 1987 Nissan D21 pickup with a 2.4 Z24 engine and Throttle Body Injection.
Has new plugs, cap & rotor, air filter. Runs ok except at idle which is a little rough and you can smell that it is running rich.
I Followed the procedures and found no fault codes..(the only code that came up was, I think 44, which meant everything was working ok.
I pulled the MAF and everthing was clean and intact. I cleaned the connectors to the MAF just in case, they were clean.
The idle screw was cross threaded so the idle was very low, I removed it and tapped out the hole and replaced it...after that I was able to bring the idle up but it is still running rich.
Any advise on what to check or try would be appreciated. I really need a good fuel mileage vehicle for work.... By the way when I first got it I could smell that it was running rich so I figured at 118k an O2 sensor couldnt hurt, so I replaced that too....Interesting that with the first tank of gas before I replaced the O2 I got 22 mpg and the second tank, after the 02, cap and rotor I only got 17-18 mpg.
Thanks in advance for your help!
New to this forum but from what I can see there are a lot of knowledgable folks here.
I recently purchased a 1987 Nissan D21 pickup with a 2.4 Z24 engine and Throttle Body Injection.
Has new plugs, cap & rotor, air filter. Runs ok except at idle which is a little rough and you can smell that it is running rich.
I Followed the procedures and found no fault codes..(the only code that came up was, I think 44, which meant everything was working ok.
I pulled the MAF and everthing was clean and intact. I cleaned the connectors to the MAF just in case, they were clean.
The idle screw was cross threaded so the idle was very low, I removed it and tapped out the hole and replaced it...after that I was able to bring the idle up but it is still running rich.
Any advise on what to check or try would be appreciated. I really need a good fuel mileage vehicle for work.... By the way when I first got it I could smell that it was running rich so I figured at 118k an O2 sensor couldnt hurt, so I replaced that too....Interesting that with the first tank of gas before I replaced the O2 I got 22 mpg and the second tank, after the 02, cap and rotor I only got 17-18 mpg.
Thanks in advance for your help!