93 Ls 400 Won't Start But Crank

[pngerring]

My 93 LS400 will crank but will not start.... after a couple of try, it start with a low rpm and if i give gas it give a puff and stops. About a week ago, it started cutting off in traffic and now it is just not starting at all.... any suggestions? I checked all the plugs and cable ... it is fine I assumed, I had a new battery put in and the problem still exist.

[dcfish]

My 93 LS400 will crank but will not start.... after a couple of try, it start with a low rpm and if i give gas it give a puff and stops. About a week ago, it started cutting off in traffic and now it is just not starting at all.... any suggestions? I checked all the plugs and cable ... it is fine I assumed, I had a new battery put in and the problem still exist.

Needs a tune up, Rotors, plugs and plug wires. ;)

[Alexander the o.k.]

Sounds electrical to me. It should go into 'Limp' mode, and never cut out while driving.

You should pull all engine codes and post them here.

http://www.lexls.com/tutorials/intro/codereading.html

Also, clean your battery terminals, tighten well and add dielectric grease.

Then the old chronic Ls issue would be my favorite go to:

http://us.lexusownersclub.com/forums/index...showtopic=50087

"This same type of problem happened to me about a year ago. This smooth world class car started balking, cutting out, lurching, wild rpms, dash flickering, radio went out when hitting the brakes, just seemed ready for the junk yard. It happened all of a sudden. No warning.

I thought the engine was toast.

Now it's smooth as silk w/ 255,000 miles on it.

Open the trunk. On the left side you will see a wire harness on the left hinge. After repeated openings and closings the wires inside that harness become fatigued and frayed. Then they start shorting out. Then sputtering, stalling, and everything you describe. This is a design flaw and lexus knows it.

If this describes your problem, then remove the plastic bracket on the left hinge, strip down the harness, untwist all the wires, re-connect, then re-tape.

Make sure to leave off the hinge bracket that ensures tension on the harness. Just let the whole mess swing free and loose.

In my case, problem solved, and no spending thousands of dollars in diagnostics, parts, and tech snafus.

Best of all, it's free. Takes about 30 minutes."

Post back what you find at the hinge, and any codes and other symptoms you have.