Eng ping when accelerating
 

My 94 325Is with 145000 miles I changed plugs,air & fuel filter.
I only use priemium gas. The problem is when I step on the gas under light load the eng. pins in 1st,2nd. & 3rd. Other than the noise the car runs great , on the last trip on freeway W/O air on & running at speed the car got 29.5 M.P.G Can any one tell me is it the millage on Eng or do I have a problem ? Any sugestions would be great thanks Vic

What kind of plugs did you use?

Pull and check the codes:

http://www.pelicanparts.com/bmw/techarticles/Mult-Code_Reading/Mult-Code_Reading.htm

Code 1225 is for the knock sensor. If the sensor goes bad, the car will be confused about whether the car is pinging or not. I have a bad knock sensor on my 93 325is right now, and it is pinging like crazy, and in the past, it has popped the code.

Let me know what you find out...

-Wayne

Are you sure it is pinging, or is it just the VANOS kickin' in? The VANOS tends give off kind of a gurgle

on a 92 325i 4door 5speed with a jc chip which is the wright plug to use i think i;m running the bosh 2 electrodes that what the guy said the book calls for

What plugs were in there previously?

What guy are you talking about?

the guy at the auto parts store you know i even didn't pay attention as to the ones i took out but from previous experience
i always use the ngk when i had my 78 530i boy i miss that car

Do you know what Bosch plugs they are?

Platinum 2? "High Power"? F7 LDCR?

yes i just check platnum 2

That may be the problem.

BMW engines sometimes have problems when using platinum plugs.

The problem with the Platinum plugs is the insulator, because of the design, it's very easy for it to foul or not conduct enough spark. I would suspect that the problem would be futher enhanced by the chip, as it essentially advances the timing, and might be causing detonation (pinging) I would try running just the regular Bosch F7 LDCR dual electrodes and see what happens.

ok will do so the bosch 7f ldcr dual elect is what the original specs call for?? also what about running ngk ??thanks

NGK BKR 6 EK would be the stock plug. Should be no problem running those.

Eng Ping
 

Jared & Wayne you guys are great thanks for the help. I had to go & pull a plug It's a bosch Platinum 2 Only number I could find is 4303. I check codes like you sugested the only number I seen to get was 1444 . Do you recomend the NKG plugs or a different Bosch plug.

The chip is probably causing the pinging. See here:

http://www.pelicanparts.com/bmw/techarticles/Mult_Chip_Install/Mult_Chip_Install.htm

-Wayne

Use the Bosch F7 LDCR dual electrode.