Multiple cylinder misfires - any insight appreciated

[Lester630]

2000 LC, ~250K, mechanically all stock

Getting CEL and cylinder misfire codes on 2, 4 & 6.

I recently had my timing belt replaced at my local indy shop (<2k miles ago), and I can't help but think it's related.

I've gotten the same codes, same cylinders 3 different times. I clear and they eventually come back.

Some things to note:
CEL only comes on if I'm starting the car and letting it idle. Doesn't seem to happen if I immediately drive it.
No rough idle - along with 3 cylinders - makes me believe it's not the coils.

The first time it threw the codes, I brought it back to the guy that did the TB. He said everything checked out, but I had him throw new plugs in since it was getting due anyway. Codes came back a week or so later.

Any insight on where to start would be appreciated. TIA.

Lester

 

[rxshun100]

Coincidentally just watched this video. Your symptoms sound similar so I hope it helps.

 

[x8o8drifter]

Had this EXACT thing happen last summer.
Problem was crank bolt wasn't torqued to spec.
So the timing wheel was wobbling a tiny bit.

But IF that's the issue get it fixed ASAP the bolt will almost certainly walk out. Mine started to.
But it was in the middle of a camping trip and I had already done like 5-600 miles before it started missing.

 

[AARONTLC]

Crank & cam sensor wiring are subject to damage during TB job due to improper routing. Worth checking.

 

[Lester630]

Thanks all!
This gives me a great place to start tracking it down.

 

[andrewderrick]

2,4,6,8 is all one bank.
Is one bank out a tooth, did they mess up the crank sensor or harness (common uz concern after belt service), otherwise you got to start looking at stuff that only affects a single bank.

 

[x8o8drifter]

2,4,6,8 is all one bank.
Is one bank out a tooth, did they mess up the crank sensor or harness (common uz concern after belt service), otherwise you got to start looking at stuff that only affects a single bank.

Didn't even look at what cylinders. But that light totally be it to since its all on one bank.

 

[Lester630]

Just closing the loop on this if anyone comes across the same issue in the future. But it was indeed the crank sensor wiring routed incorrectly during the TB replacement. Thanks for the insight.