1986 Toyota Cressida unknown problem

1986 TOYOTA CRESSIDA
143,000 MILES • 6 CYL • 2WD • AUTOMATIC
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KEN FRANKS
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I have a 1986 Toyota Cressida station waqon and recently installed an engine from a 1984 Cressida wagon.
When driving the car I have what appears to be a misfire. I have put in new plugs, wires, distributor cap and rotor and installed a new fuel filter prior to having the engine put in the car. Also installed a new coil on the advice of a mechanic.
When I put the car in park or neutral I can rev it up to 4-5000rpms and it's nice and smooth. But when I drive the car, it starts to misfire.
The engine I put in the car had set up for about 4 years and I'm wondering if the problem might be with the fuel injectors? Would the injectors have different requirements when driving and when I put it in park and neutral and rev it up?
I've run 2 cans of injector through 2 tanks of gas with no change in performance.
Thanks for any help or advice you can give me.
Ken
Oct 22, 2010 at 11:16 PM
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RASMATAZ
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  • 75,992 POSTS
1.Lack of compression
2.False air leakage.
3.Faulty fuel injectors.
4.Insufficient fuel pressure.
5.Contaminated fuel.
6.EGR valve that is leaking.
7.Oxygen sensors.
Oct 22, 2010 at 11:27 PM