My m50 is pinging. Running out of ideas.

[Ryann]

Damn.

[Wishno87]

Did the spray version of the seafoam and some of the regular stuff in the gas tank. Put my old 02 sensor in and putting the new one in the e34. We shal see what happens.

[meanEG]

Another way to tell if it is a compression problem is drain the tank and run some race fuel or a lot of octane booster.

[Wishno87]

Well seafoam did nothing. Will try it once more through the intake and it's also in my gas tank so I will let that run though. Going to test fuel pressure next then thinking about doing the fpr and ecu coolent temp sensor.

[Ryann]

Did you do it like this?

http://www.bmw4life.com/ping.htm

[Wishno87]

I used the spray stuff. It comes with a tube you put in your throttle body. I will try it that way next time though. Cool site! Thanks for the link.

[Wishno87]

So this is where my fuel pressure is at and it did not move as I revved it up.

[Dj Buttchug]

damn. wtf can this be. fuel press is solid for sure

[88SuperETABD]

I didn't read all the pages, but have you considered your tune/ecu to be the issue? also what gas you using? does it ping if you use higher octane?

[Wishno87]

Stock ecu and I always use. 91.

[Wishno87]

Anyone know anything about this? It seems to be some sort of fusible link or resister. Its on my injector harness and its cracked.

[Wishno87]

Someone told me they had similar issues with a damaged resister so I will replace it and let you guys know what happens.

[Ryann]

A resistor in an injector ground wire? Weird.

[e30austin]

All the TU cars had them. It's a 240 ohm resistor that is the main ground wire for the DME (goes directly to pin 15 iirc). They're known to crack and do funny things.

[e30austin]

However, I'd say Josh's is in good shape compared to 99% of the ones I've seen.