almost constant backfire

[88blue-z]

as the title states i got a backfire issue it does it after being driven its real slight but still annoying the cats gone but the previous owner has a shitty oe spec muffler could that be the issue?the cap and rotar has been replaced along with the plugs this is my only real complaint on the car mechanically any help is GREATLY appreciated!!

[turbovanman²]

Check cam timing and ignition timing.

[Orangetona]

Yep pretty much, sounds like a timing problem

[RoadWarrior222]

At least hope it's a timing problem. Because if it isn't, it's a valve not sealing somehow, (Chipped, melted, bent etc)

[tryingbe]

If the popping noise is only when the car is in deceleration, put the cat back in or live with it.

If it is there when you accelerate as well, check your cam and ignition timing.

[88blue-z]

whats the procedure for adjusting the timing?

[turbovanman²]

Unplug coolant sensor-one by the thermostat, set to 12 deg, turn off car, plug in coolant sensor, your done.

[88blue-z]

by turning the distributor? sorry ive never messed with this before

[Orangetona]

You have a timing light right? If not, its kinda hard to get it right if you dont have experience in doing it. '

Yeah, you turn the distributor. Also, make sure you unplug the coolant temp sensor. Like Simon said.

[88blue-z]

ill borrow dads light and knock this out tomorrow hopefully its a sucess thanks for the help guys!

[Orangetona]

No problem. Im sure it will help you out tons.

Make sure your cam timing is on though!

[88blue-z]

and how do i check/adjust cam timing?

[tryingbe]

http://minimopar.knizefamily.net/enginetiming.html

To get the timing belt correctly onto the cam pulley is the start.

There is three way to adjust cam timing.

1. Adjustable cam pulley.
http://turbosunleashed.com/shop/fida...ars-p-281.html
http://turbosunleashed.com/shop/fida...ars-p-280.html

2. Degree key
http://turbosunleashed.com/shop/offs...aft-p-250.html

3. MP Cam pulley with different key slot cut in it.

[turbovanman²]

and how do i check/adjust cam timing?

Remove the plastic plug on the upper timing cover, hook up timing light, pickup goes on #1, that's the one closest to the passenger side of the car, start the car, should be warm, unplug coolant sensor, check ignition timing, window is on top of the trans, if around 12 deg, then shine timing light thru the hole, you should see the oval hole in the timing gear somewhere in that hole, if you can't see it, cam timing is off.

[VaShelby]

I had the same problem around two weeks ago pluss engine was loosing power. I knew the missing cat would cause some back fireing but but it was louder than normal and more BFsPM (back fires per min ) lol made that up. I checked everything then decided to clean throttle body and reset air idle control. when I remover tps connector I found that plug pins were green. I replaced plug, reset aic and that seemed to quel BFs

---------- Post added at 05:12 PM ---------- Previous post was at 05:10 PM ----------

But I would still check timing as stated above . Sounded like such a good idea Im gonna do that as well.http://www.turbo-mopar.com/forums/sh...gine-cuts-out.

[88blue-z]

howd u reset AIC

[moparman76_69]

If it is just a slight popping at idle then it is probably a bypassed baro.

[88blue-z]

thats exactly what ive got is it anything i need to worry about?

[moparman76_69]

Every one of these cars I've ever seen does it because the baro goes out and the map ends up hooked directly to the intake. When the computer looks for the atmospheric pressure through the baro it gets engine vacuum instead and that causes it to pop. At least that is what I was told.

[88blue-z]

How would i correct this?