I am in the process of swapping MAF to MAP and have run into trouble. I repined the ECM following Mike's guide but I have noticed something weird. 165's D1 is a system ground and it says to put it do 730 D1. Then it says if you are using the MAF's +5v, ground, and signal wires, which I am, 165's D1 should go to 730's B6, what should I connect the 165's D1 wire to? The car wants to start, but won't. I have DTC for the est circuit and cylinder select error. I am using a 7730 memcal out of a beretta but with a fbody prom, this is ok correct? Thanks for the help.

 

You MUST use the memcal for a TPI car. The reason you are getting a cylinder select error is because the EST circuitry is from a V6 Memcal (Berretta).

 

dohh glenn caught it before i did plant :-) but he speaks the truth u have to have the correct memcal for the style/yr of engine u are running.

I wasnt aware u were doing the 730 swap :-) We live about a 1/2 hr apart so we should get together and go over tuning notes and features, i cant find anyone else clse to us that is willing to or has undertaken there own tuning

talk to u later
jeremy

 

I knew getting a memcal with my ecm was too good to be true. As for the ground, should I just splice D1 into B6?
We'll meet up sometime Jeremy. I definately consider myself a newb, I changed my PEvsRPM by as much a 20% both ways and saw no result on sunday. My best time was with an ARAP bin with stock fueling and spark.

 

The proper wiring of the grounds (165 to 730) are as follows:

D1 ---> BD1
D3 ---> BD6
D10 --> BD7

Though they are ALL grounds you should wire it as per above and not just splice them all together. The wire size, pins and connectors can only handle so much current before you start to fry things. Splicing grounds together to share a wire can cause too much current to flow through a common wire. Follow the wiring suggested above, and you won't have any problems.

 

This is how I currently have it wired. However, BB6, MAP ground, is empty.

 

Tie 165's D2 to 7730's BB5 & BB6. Those are sensor grounds for the CTS, MAT, TPS and MAP. Seldom will all 4 of the sensors carry the full current load simultaneously. Also, it looks cleaner when all done IMO.

 

One last question on the memcal, would one from a 90 a4 vette work?

 

Back from the dead a year later....

PLANT PROTECTION or Anyone else who has done this swap,

I just came across the same situation, I repinned according to Mike Davis' article and found that D1 from the 165 going to both BD1 and BB6.

So have you had any problems sharing D2 with BB5 + BB6?
Does that wire get hot at all?

 

Don't want to chagne the topic, but how much HP can one gain by doing a swap. we are searching out some bugs on a friends camaro adn ttalked about doing this mod to eliminate the possibility of the ECM as a problem.

Heard the gains are good over teh crappy MAF system they stuck in these early cars. Only a handful of guys can run them with any luck.

Manifold density is the way to go from what I hear.:hail:

 

I ran D1 to both BD1 and BB6 with no ill effects after a year.

 

Thanks PLANT PROTECTION

I'm going to try and e-mail Mike to have him add a note to that article for future swappers.

sbcman

I'm doing the swap mainly because the 730 is more tunable.
This might introduce a few bugs so I suggest you get another 165 and get the bugs worked out of that before you attempt to swap ecms. By chance I just happen to have a working 165 I don't need anymore

 

Gaining or loosing HP is a non issue. You don't really gain or loose HP, but you coax more HP out of a current engine setup with tuning. What you are doing in swapping to a better generation of the ECM for our cars. Most new cars are using the MAF system as opposed to the Speed Density. The SD system only lasted a few years with GM vehicles. In actuality, the MAF system is more accurate.

The newer style of cars have a much better ECM to work with than us, so the MAF works out better for them. We have to work with what we got and it doens't take much to swap in a 730 ECM to our 165 MAF systems.

I am planning to do the swap to 730 here very soon, and I can't wait to be able to tune this car better once I set it up with speed density. There is no doubt that the 730 ECM has much more support from our community. Which is one of the main reasons for the swap.