xzl6b1

I'm a new owner, and need the spanner or hammer to find a misfire issue.

If available please reply or call 810-750-6481
Southeast Michigan
Charley

xzl6b1

this is a 1989 928 S4

AO

I've got a few diagnostic tools. Unfortunately, I'm only around on the weekends. If the car is drivable, you can bring it over and we can scan it.

I have both the 928BT (Hammer clone)
and the SharkTuner 2 which can tell us a lot of things as well.

I'm in Canton, MI. You can call me at 734-eight three seven - sven nine zero eight.

xzl6b1

thanks Andrew will call the week of 8/23 (out of town this week)
This is my first S4, a restoration (I may rename it an S$) .

Used some of your threads/guides for several of the repairs/checks below:

in-tank pump replaced
LH computer rebuilt
injectors checked/cleaned/ new seals
intake cleaned/painted refreshed
FPR/dampers checked
Hall sender and connector (in process, connector broken)

It looks like the MAF just failed. Will replace, and would appreciate running your scanner to check for other problems, ........

regards, Charley

AO

I also have a spare LH, EZK, MAF, and other bits and pieces.

928mac

Andrew, IYO, which is the better diagnostic tool over all.
Will they see poor grounds?
will they see (wts) if a door switch is open or closed.
wts if the horn relay is energized
these are just gen questions to see how deep porsche got with there Pids

this would help me in which one is best for me.
I know the shark dose ign and fuel remapping

AO

Hard to say which is better. I guess it depends... Depends on what you want to check, what year your car is, etc.

Theo's DT928 is a fine tool but I have found "issues" in connecting to various cars. First off it's only for 87+ cars. The main issue that I have found is that if you have early '87 chips, or aftermarket chips, you cannot connect to it. (Haven't tried it with my current PEMs). This can be frustrating.

However, if you do connect, it does a reasonable job of telling you what stored faults there may be. It lets you drive certain parts on the car, like the ISV, horn, door locks, injectors, etc. This can be useful at times.

As far as I know, it cannot tell you if grounds are bad (I don't think anything can pinpoint that). IIRC it can tell you if a door is open, but it's been a while since I looked at it. I know you can drive the lights on/off on the 91+ cars.

One of the main things I use it for is to reset airbag warnings, and run the PSD for flushing. It's a nice tool. All of the things I just mentioned cannot be done by the STer.

Before I got the STer I also used it to record knock count and check TPS operation, but now I rely on the STer for those functions.

The STer can give you some good real-time data and tell you if there is a fualt with the knock sensors, hall sensor, etc. It does not read fault codes, however. The DT928 can too, but it relies on stored codes, the STer is real-time.

The STer also lets you tune for various things which is something the DT928 cannot do.

Since I own both, I generally choose the right tool for the job. STer for tuning, and DT928 for detailed diagnostics.

John Speake

Diagnostic testers do not work with diagnostic testers. This is because the K and L data lines are routed for ST2 use and the tester can't communicate with PEMs. A tester can communicate with an EPROM made from a saved ST2 bin file, because that act automatically reactivates the diagnostic tester function of the data lines.

AO

Cool. Good to know. I haven't tried that yet.

I may have asked this before, but do you know if I use a ST2-based EPROM in a 91+ car if the Check Engine light flashing code will work? Just curious.

John Speake

Yes, it will work...