Eng ping when accelerating

[Vic Mayer]

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

[Jared at Pelican Parts]

What kind of plugs did you use?

[Wayne 962]

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

[blkongry]

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

[josev]

Originally posted by Jared at Pelican Parts
What kind of plugs did you use?

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

[Jared at Pelican Parts]

What plugs were in there previously?

What guy are you talking about?

[josev]

Originally posted by Jared at Pelican Parts
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

[Jared at Pelican Parts]

Do you know what Bosch plugs they are?

Platinum 2? "High Power"? F7 LDCR?

[josev]

Originally posted by Jared at Pelican Parts
Do you know what Bosch plugs they are?

Platinum 2

yes i just check platnum 2

[Jared at Pelican Parts]

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.

[josev]

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

[Jared at Pelican Parts]

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

[Vic Mayer]

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.

[Wayne 962]

The chip is probably causing the pinging. See here:

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

-Wayne

[Jared at Pelican Parts]

Use the Bosch F7 LDCR dual electrode.