Mechanics

NOT STARTING BACKFIRE INTAKE

1995 Lexus LS 400 • 180,000 miles

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
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Saeed.almeq
July 24, 2012.




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

Roy

ASEMaster6371
Jul 25, 2012.
Checked timing belt twice its on the notch?
AD

Tiny
Saeed.almeq
Jul 25, 2012.
Start with a compression test and fuel pressure test. Get back to us with the results

Roy

ASEMaster6371
Jul 25, 2012.
Checked compression all is above 170psi

Tiny
Saeed.almeq
Jul 27, 2012.
Ok, fuel pressure?

Roy

ASEMaster6371
Jul 27, 2012.
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
Saeed.almeq
Jul 27, 2012.
Bingo, I bet you have a timing belt issue. If not, then you may have a burned valve.
Roy

ASEMaster6371
Jul 28, 2012.
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
Jul 28, 2012.
And what I should do with the cylinder that dont have comperession?

Tiny
Saeed.almeq
Jul 28, 2012.
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

ASEMaster6371
Jul 29, 2012.

AD