Question about 1992 Plymouth Laser

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My tx3 laser is backfiring, seems like fuel

My tx3 laser is backfiring and lackin power, seems like fuel injectors but not sure???

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Had fuel filter replaced & fuel pressure checked ? Good place to start.

Posted on Oct 03, 2009


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Engine light is on and very heavy on fuel backfiring when pressing accelerator

Engine lite means engine is not running properly, backfire means you have a ignition problem, bad spark plug wires, bad spark plugs heavy on fuel means it is not burning the fuel properly to get good power from it. Check or replace plugs and wires. put some injector cleaner into the fuel tank if it is fuel injected

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Loss of power when you first acelerate

Not sure what itnighters are, sorry.

You seem to be describing a flat spot - a hesitation during initial acceleration that is commonly caused by either insufficient spark power or the fuel system being slow to adjust to the new requirements.

A backfire is an explosion in the exhaust system and I wonder if you really meant a spit-back (through the intake), which is common with a fuelling caused flat spot?

Replacing the spark plugs is merely half the job and testing the spark power is the other half...

I suggest you check the fuel pressures and pressure regulator function and the injector spray patterns. Only if all tests good it could be worth testing the oxygen sensor...

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99 kia sportage, backfiring, no power, rough idle.

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Why my 1997 f150 4.2 runs bad

Fuel supply or valve-train issues come to mind.
If the fuel mixture is lean, that will cause backfiring and loss of power. Poor fuel atomization caused by incorrect pressure or plugged injectors should be considered.
Cam timing is a possible issue. Has the cam drive slipped?
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Engine Trouble

Your getting backfires? hmm interesting. Seems like your engine is getting flooded and either purging it out of the exhaust or burning it all at once or both (backfire). Sounds like a leaky engine valve to me.There again the bluish smoke indicates to me thatyou are leaking oil somewhere- bad rings or head gasket maybe, which could cause a loss of compression which could also cause your problems.That rattling from the left/rear side sounds like a bad muffler try kicking the muffler (not hard though) next time you walk by it.

Mar 10, 2009 | 1993 Nissan Altima

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Backfiring and loss of power

'till you do some in depth testing of all systems, I'd place equal weight on every possibility. Make sure you cover the basics like fuel filter etc before getting crazy with it though. Also check cap. rotor, coil and wires. Idle cylinder pressure is different than that encountered when driving. This additional pressure will cause ignition spark to seek a better easier ground,(not the spark plugs where it should be going) causing missing under load.After checking , if you haven't found anything, its time to begin testing fuel pump pressures, modules and controls.
good luck

Feb 10, 2009 | 1994 Jeep Wrangler

1 Answer

Backfire through intake

 Check compression possible tight valve lash, if ok Check for vacume leak, make sure firing order is correct, check power to injectors an make sure injectors are working. 

Nov 29, 2008 | 1992 Honda Accord

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