Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: billhon on June 11, 2020, 22:59:20

Title: Engine of 250 so cuts out above 4500 roms
Post by: billhon on June 11, 2020, 22:59:20

The engine cuts out severely above 4500 RPMs and backfires. Every other couple of times it's very hard to start the car and almost wants to run down the battery. The plugs are fine and it idles great at 900 RPMs . It runs very well up to the point of the cutting out and backfiring. This is a relatively new development. It had a valve job at 110,000 miles and it now has 145,000 miles. It's been impeccably serviced. Thanks for any advice I can relay to my mechanic. He's in the process of pulling the valve cover and checking things out in there.

Title: Re: Engine of 250 so cuts out above 4500 roms
Post by: hkollan on June 12, 2020, 06:29:30

Hi,

Could be a bad coil. I’ve had that with very similar symptoms.

Hans K

Title: Re: Engine of 250 so cuts out above 4500 roms
Post by: billhon on June 12, 2020, 12:59:50

Thanks! I forgot to mention the mechanic hears a knock from under the valve cover.coukd that be valve adjustment or lifter? Hmmm, if nothing is wrong under the valve cover and the coil is bad and he didn't check it first then I will be paying too much for this repair....