Quote:
Originally Posted by paulv7260
A couple of issues:
1. When I start er up and rev there is a mild backfire, not loud but more distinct than a cough.
2. Decelerating then cruising at 1500 RPMS there seems to be a lot of lag and what I think are vibrations coming from the chassis.
3. Car runs smoothly but at idle the lope is noticeable especially under my seat. To be expected with the L99?
860 miles on her. Thoughts from the experts before I take her in? I'm also waiting for the clip to fix the A pillar pop-out problem (its on backorder). Think I can wait until then?
Thanks
Paul
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1. how soon after starting it up are you reving it? during startup the engine runs extra rich. reving soon after startup is liable to cause some backfiring as there is excess fuel not being burnt.
not to mention, reving it too soon after engine start is not a good idea to begin with as you are putting excess strain on the motor before the oil gets a chance to circulate thruout.
2. what gear are you in when you are cruising at 1500rpm? try down shifting a gear. then again, you are in the auto.... and when you are cruising, it most likely is switching to 4 cyl mode.
3. let her break in some more.
you can wait on the A-pillar. its cosmetic.