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Originally Posted by D@$uPeRc[-]@RgER
Hi everyone, i just bought a '93 maxima se auto about 5 weeks ago and it had been working fine until one day its mysteriously wouldn't rev past 3000rpm...or so i think because the tach doesn't work!(it happens at about 25mph in 1st gear). And the moment this fake rev limiter would appear my car would just stall and wouldn't start even though the starter was turning the motor over. Then when i would unplug the fuel pump relay and plug it back up the problem would be gone for a couple of days until it would reappear again!
So i replaced the relay and the car ran fine for about 10 days until it started acting up on me again. So i went through the forum and decided to check my coil packs and sure enough they were cracked beyond belief. so i sealed them up with hi-temp red RTV silicone sealant and the car was running fine until it started doing the same shananigans again!!
Now i also read that the fake rev limiter can come on when the ECU goes into fail-safe because of the MAF. So i checked the ECU for codes and it showed code#55(suprise suprise!). another thing is that throughout the whole 1600miles i've driven it NEVER has the check engine light gone off! And if all of this wasn't weird enough.... the fake rev limiter keeps on shifting around! which further shows that its not the ECU going into fail safe. i'm not precisely sure at what the rpm range is but in 1st gear it can be anywhere from 15mph to 30mph. Once in onverdrive the car wouldn't go over 55mph on the highway! all these symptoms just dont add up in my opinion!
When the car isn't acting up though it flies! Needless to say its VERY frustrating. The only thing i changed so far is the fuel filter which was so dirty that black soot was coming out of it when i took it off and it looked like the original filter too lol! The air filter is also new and i haven't changed the spark plugs yet. the car also has a huge exhaust leak at the flex joint. The previous owner used to use regular gas in it so when i got it off his hands it was running like crap and would stall everytime! the moment i put in premium it stopped acting up for a while. Sorry for the long a** first post! I'm just real frustrated about none of the symptoms making sense at all! any suggestions?
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Replace the mass air flow sensor, preferably with a good used one to prevent your repair costs from getting too high..