NOT STARTING BACKFIRE INTAKE

1995 Lexus LS 400

Tiny

Saeed.almeq

July, 24, 2012 AT 11:25 PM

Engine cranking clockwise and backfire from intake, engine while cranking is trying to rotate counter clockwise?
Timing belt replaced
Spark plugs and wires ok + there order

FOUND 50469 RELATED QUESTIONS

10 Answers

Tiny

ASEMaster6371

July, 25, 2012 AT 12:17 AM

Sounds like a timing control failure. Could be failed timing belt.

Roy

Tiny

Saeed.almeq

July, 25, 2012 AT 8:09 AM

Checked timing belt twice its on the notch?

Tiny

ASEMaster6371

July, 25, 2012 AT 11:38 AM

Start with a compression test and fuel pressure test. Get back to us with the results

Roy

Tiny

Saeed.almeq

July, 27, 2012 AT 7:41 PM

Checked compression all is above 170psi

Tiny

ASEMaster6371

July, 27, 2012 AT 9:28 PM

Ok, fuel pressure?

Roy

Tiny

Saeed.almeq

July, 27, 2012 AT 9:51 PM

Yes fuel pressure is 50+ psi
Injectors firing
Crank +cam sensors checked
No check engine light, no codes
Forget to mention that cylinder no1 has no compression at all

Tiny

ASEMaster6371

July, 28, 2012 AT 7:51 PM

Bingo, I bet you have a timing belt issue. If not, then you may have a burned valve.
Roy

Tiny

Saeed.almeq

July, 28, 2012 AT 9:02 PM

Hi roy
i rotate the crank several times and check timing marks there ok
but im thinking that timing belt is for a 99 ls400

Tiny

Saeed.almeq

July, 28, 2012 AT 9:04 PM

And what I should do with the cylinder that dont have comperession?

Tiny

ASEMaster6371

July, 29, 2012 AT 2:16 PM

Inject air into the cylinder to find out where the leakage is coming from. Then you will have to remove the head and perform the needed repairs.

Roy

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