3.6 conversion - how do I connect a "Hammer"

[Duc Hunter]

So my Rat Rod is now running and to a point where the engine needs a little TLC. It has some issues like;

• Runs rouch at cold start, warm it runs pretty good at idle
• Misses at full throttle accel, so I adjusted the airflow meter spring tension to help this a lot. This is a bandaid though because AFM should not need to be touched.
• When you stab the throttle quickly (like cruise to WOT) there is a big pause, then the car pulls.

Those are a few of the issues. I know its not the ignition, that has checked out. It could be fuel pressure (installing a gauge this weekend to check). I realize my best bet it to put the car on the dyno, and read the AFR's as see where it is at. The car has a Steve Wong Chip, so I know that part is wonderful.

I also realize I would still be flying pretty blind but, if I could communicate with the ECU though a Hammer or a similar device, I would probably learn a lot that would guide me in my quest to get her running well. Question is what wires do I need, where would they be found in the 3.6 wire harness (colors etc) to connect up a hammer? I did not do the conversation, or I would have left those wires out.

[Tippy]

This screams vacuum leak to me.

[dad911]

964 or 993? which obd?

The info is out there, google "964 OBD" or "993 OBD"

Also found this:
DIY diagnostic reader for OBD1 cars (964, early 993)

[Duc Hunter]

964 so ODB 1.

Vacuum leak....well I am looking into that as well. I had one and fixed it.....and nothing changed. I have even sprayed around the engine bay with brake clean to see if I have one (old school hot rodder technique) and nothing seems to change. I do not disagree though....just thinking a hammer would really help narrow my search.

Originally Posted by dad911

The info is out there, google "964 OBD" or "993 OBD"

Also found this:
DIY diagnostic reader for OBD1 cars (964, early 993)

I did search, and did not see that. I also believe it would not be that hard to connect it straight to a Hammer, with the traditional OBDI connector. I searched here and Rennlist, and while I found some info, nothing seemed to be concrete. I would think, but now, someone would have posted a how to with pictures etc. LOL

[dad911]

how to add OBD plug to 3.6 transplant

How to use an OBDII diagnostic port in a 3.6 transplant.

[john walker's workshop]

Clorinated brakekleen through an engine produces phosgene gas. Have fun. Same as welding around it.