Try this just for hoots. Disconnect the battery. Both terminals. Touch the cables together for about 20 seconds. Reconnect the battery. Take it for a test drive and accelerate as soon as you feel it's safe to do so to see if it still acts goofy.

 

Lugnut,
Should I also consult a shaman?
Was that a serious post? Hell, I'm willin' to try anything. If a naked raindance on the hood might work I'd give it a go...

 

please tell me, the backfire is in intake or exhaust side?

 

Intake

 

If there's a shaman in your neighborhood, definitely consult him. Keep your clothes on, though.

About the battery, I was serious. Doing the disconnect/reconnect as described will reset the ECU to factory defaults. It's just like rebooting Windoze on your PC. If it's stuck in some goof mode with a bunch of bad data, this will clear it out. It may be clear for only a few miles before enough bad data has accumulated to recreate the problem again, hence I suggested accelerating as soon as you felt safe doing so.

This will tell you if software is causing your problem, although software may not be the problem. Yeah, okay, let me explain. The software may be working correctly but it may be getting bad data from a sensor and making unwise decisions based on that data, for example.

On the other hand, pay attention to sleepwalker. He's da man around here.

 

For years I've disconnect the ground, left it off for 15-20 minutes and then reconnected. Does a more complete resetting of the software occur by touching both lines to one another?

 

if intake, then it's just as simple as the sparkplugs!

if it is doing it while under load such as accelerating while on gear then it is the air mass sensor or it's wiring.

if it is none of those two, the software in your engine control unit is the problem. try restting the adaptation mixture and set the ignition to lower octane rating (93), and fuel enrichment to stage 1. or else, the control unit needs to go.

 

make sure you don't have a bad fuel in your tank and that there is no air in fuel rail.

 

By touching the two cables together when they're both removed from the battery, it turns a 15-20 minutes procedure into a 15-20 seconds procedure.

 

Ok Guys, I have the 94 C 280,, paid 189 bucks for them to tell me nothing is wrong other then Plug wires.. they wanted 500 bucks to replace them.. Took me 30 minutes...

PROBLEM STILL HERE....
MAF was good according to them.
everything else was also good ( electrical)

HELP!!!!!!!!!!!!!!!!!!!!!!!! or please come steal it!!!!!