Why is my car only firing 3 pistons?

HUNTERBROUILLETTE

MEMBER
2001 ISUZU RODEO
100,000 MILES

Only 3 of the six pistons are firing and I replaced the plugs and it worked for a day and now it doesn't work again

Monday, September 17th, 2012 AT 10:32 PM

6 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Start with a compression test to verify the motor is good.

Roy

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Tuesday, September 18th, 2012 AT 12:57 AM

KHLOW2008

MECHANIC
41,814 POSTS

Which 3 are working? Any trouble codes? Any repairs done prior to this occurring?

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Tuesday, September 18th, 2012 AT 9:40 AM

HUNTERBROUILLETTE

MEMBER
3 POSTS

The pistons on the driver aren't working. And I forget the exact codes but it said that there were random misfires. And I had to replace the engine in the car recently.

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Tuesday, September 18th, 2012 AT 10:19 AM

KHLOW2008

MECHANIC
41,814 POSTS

You mean this happened after replacement of engine?
Apart from misfiring codes, are there any others?

The compression suggested would tell us something.
If replacing the spark plugs worked for a while, it could be the injectors or cam timing etc.

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Tuesday, September 18th, 2012 AT 10:23 AM

HUNTERBROUILLETTE

MEMBER
3 POSTS

Yes it occurred after I had replaced it. And I don't recall there being any others but ill perform another check to be sure. And I reset the timing and made sure that it was perfect a few times because I had thought that that was the problem