I know the topic sounds weird but I just recently started having once again another problem with my Celi.

I turn the car on and it'll idle fine at first. But once it's warmed up the rpm's drop from 800 to about 700 or so and I can hear like a small pop sound from the muffler. Sort of feels like the engine is about to cut off but it doesn't. It also does it when I drive. If I give it gas and than let go slightly the rpm's drop quick and than come back up, but once I step on the gas a bit it wont do it....

???????

With the muffler, is it backfiring a lil bit? Could be because there is not back pressure. For the gas part, could be that your engine is choking on fuel or not getting enough. Possibly change your fuel filter/pump.

i know the exact sound you speak of, its a misfire.

if its only occasional and at idle then its likely a plug problem, a poorly gapped plug (too large or too small) can do that.

could be also the cap/rotor is worn, a sticky injector, etc.

Just got worse and now the car really feels like it's gonna turn off. Was driving on the highway from work and the car wouldn't go past 65 in 5th gear.....

????????

Check to make sure your plug wires are on securely.

>

No back pressure is a good thing. Try shoving a spud in your tail pipe and starting your car... Why would you go and tell someone the 1 problem with their car is that they don't have more problems?


Sounds like a sparking problem as the other people have mentioned as misfires lead to backfires and both symptoms are noted. Can't be "not getting enough" because there's enough for a backfire.

Problem fixed.... The timing belt had jumped and the reason was that one of the small circle things (I believe it's called something like a sensor or something in spanish atleast LoL) was broken. Circle thingy replaced timing belt put back on, car running great .

Thanx for all the suggestions.

tensioners? idlers?

I believe it was the idler's.