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-   -   New and need help 2000 LS300 (https://www.saturnforum.com/forum/new-member-area-9/new-need-help-2000-ls300-10333/)

Matt Bell Nov 8, 2015 06:57 PM
New and need help 2000 LS300
 
I bought a 2000 ls300 with a 3.0. It had a blown engine. I bought a used motor and installed new plugs, valve cover gaskets, water pump, all timing components, and put the engine in the car. Engine runs, but throws a p0301 cylinder #1 misfire. It also backfires in the intake. I've checked the timing multiple times and its spot on. Not for sure where what else to check. If it was just the p301 I would check plug, coil, and injector. But with it backfiring, I'm at a loss.

02 LW300 Nov 8, 2015 08:15 PM
Welcome. Please check compression and report back.

Matt Bell Nov 8, 2015 08:43 PM
No compression on cylinder #1. This is the 5th engine I've gotten that has had compression issues. 2 from on place, 2 from another, and this one from a different one. Going to call tomorrow and see if they will help pay to have the heads reworked. Its under a 90 day warranty. ugh and double ugh.

02 LW300 Nov 8, 2015 09:25 PM
These are interference engines, so when the timing belt breaks the valves bend. Sorry for your troubles. These are nice cars when they run correctly.


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