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here is my problem start hard when it starts the fuel flows alot inside the engine and then smokes and runs very rich fuel leaking through exhaust and big cloud smoke from rich fuel comes out help me and when i press on gas it goes up to 3500rpm and then wont go any higher.I did a engine swap I had 95 v6 engine and now 93v6 in 95 body.the car is mazda mx6 v6 ls 5speed. help me

was that english?

Ya you need to clarify plz but from what small parts I understood it sounds pretty bad. your car wont rev over 3500 rpms and its smoking? sounds internal.

Sounds like a very stuck injector or 2, especially with raw fuel from the exhaust. Check all the sensors starting with the MAF and throttle position. Check your fuel pressure, if it won't build you have injectors that won't close. May be some $hit in them, you may have also crossed your fuel return line eith a vacuum line and are feeding raw unvapouriized fuel into your intake. To check this pull some spark plugs and motor it over. If fuel spills out if the spark plug holes, that's it. Sounds like way too much fuel to be a big problem, but if you run the car like that, you will burn your pistons and cylinders. Check to see if there is gas in the oil too. That will tell you to look for something simple. Don't worry...yet.

I told him to check his VAF first. Same thing happened to me before and I had to replace my VAF.<p>The injectors could be the problem, something I didn't consider before. But I've had my FPR turned up to it's max before while idling at 800, it only raises the rpms a few hundred.

I did got the spark plug out and turned the engine the fuel was spitting out alot and I changed my vaf but the problem the same the rpm wont go over 2600 rpm when pressed on gas pedal.

Track all the vacuum lines and your fuel return line next. Especially the ones to the vapour canister. Is there gas in the oil? If so change it right away.<p>[ March 20, 2003: Message edited by: laboiler ]</p>