Cascade Crew

scott in wa. · Last edited by scott in wa. on Tue Apr 04, 2006 6:28 am; edited 1 time in total

Ok well I have some questions, yet again.

We ahve this 88 IROC 305tbi car.
I was wondering,
1. What mask do I use to burn a new chip for this thing,
2. What computer is it there?
Also when we do the swap to TPI the 165 computer
3. How much of the harness do I have to swap out?
4. And can I buy the harness?
5. is it just the front half???
6. I have the 165 computer in the 88 iroc that Iam going or planning on moving to the new car, in the 87 z28 (tpi maf) Should I not do that and just go SPEED density? We have a big cam in the tpi engine that we are moving to the 88.
Just looking for some input on what to do.

Thanks
Scott

scott in wa. · Posted: Mon Apr 03, 2006 10:50 am Post subject: computer

I can't afford the holley stuff so Iam going to stick with the 165 computer.
I have been looking for a swappers guide to my application but can't seem to find one.

87 z28 tpi
Into a
88 iroc 305 tbi

thanks
scott

Twilightoptics · Posted: Mon Apr 03, 2006 4:25 pm Post subject:

You'll need to get wiring diagrams for each setup and figure out where you need to repin and splice.

You could just pull the entire TBI harness and put in the TPI harness. Just unplug and keep going until there is nothing left.

Check the TGO PROM 101 article for all the masks.

You could buy a harness for around $250 from painless.

You have the 165 ecm in the 88 TBI car? I'm confused now.

Speed density is harder to tune to get it to run right, but a little nicer afterward. MAF is much more forgiving of a big cam. Do what you really want to do with it. MAP is nicer, you don't have that spendy piece of maf infront, and not having it htere will never ever limit airflow.

scott in wa. · Posted: Tue Apr 04, 2006 5:24 am Post subject: oppps

No I messed up.

I meant to say the 87z28 has the 165 computer.

Did the 88z have a MAF for the TPI in that year?

I may end up doing what’s easiest,

Iam not sure it will run if I go with the speed density setup. I remember all the problems I was having with the maf setup and trying to get a chip that would work, so switching to speed density kind of scares me.

Scott

scott in wa. · Posted: Tue Apr 04, 2006 6:27 am Post subject: speed density

Ok, Sell me on speed density.
Is it any harder to install the harness???
what about the cutom chip????

same sensors?????
thanks
scott

Twilightoptics · Posted: Tue Apr 04, 2006 9:01 am Post subject: Re: speed density

scott in wa. · Posted: Tue Apr 04, 2006 10:00 am Post subject: +++ to speed density

So what are the pro's on going with the speed density?

If It runs off the vacuum, sometimes there isn't much, (cam) it does affect the brakes some times. So Iam thinking that the new type setup would be a huge problem, correct??
Thanks
Scott

Dewey316 · Posted: Tue Apr 04, 2006 10:05 am Post subject:

Speed density has some advantages, some trade offs. IIRC when we were working with mikes car, and the hot cam. We found that he was maxing out the 255gm/s reading of the MAF sensor. SD setups do not have this issue, as it fuels based off the VE% for a given MAP reading, and RPM.

Twilightoptics · Posted: Tue Apr 04, 2006 12:46 pm Post subject:

Dewey316 · Posted: Tue Apr 04, 2006 12:50 pm Post subject:

True. But when you max out the 255gm/s limit, it fuels the same for 256gm/s as it does for 350gm/s.

Yes, I did do things in baby steps, but you can tune SD from scratch, on even a wild combo, CheezX dropped the 406 in, and got it running.

Twilightoptics · Posted: Tue Apr 04, 2006 10:22 pm Post subject:

scott in wa.

Well that’s something to think about, Iam not sure I would be capable in getting the car running with that cam. So right now Iam thinking Maf...staying with the set up I have.

It just sound like a huge problem, Iam not sure I want to spend the 4 weeks of crying trying to get it to run right.

On another subject, the tbi 88 iroc 305, when I ground out the ADL I get no code, I mean no code, should be a 12 come up right? just like the 87z28.
Computer in the convertible 88 tbi car might be dead. Weird that it still runs.
Any suggestions on this one??

Also the cooling fan is not coming on. where is the fan temp switch? The fan switch has to be there. It must look different than the one in a 87 tpi.
Cant find a location for that swich in my manuals for the tbi car

Thanks
Scott

Dewey316 · Posted: Wed Apr 05, 2006 11:25 am Post subject:

Scott,

The fan switch should be located between Cyl #6 and #8, on the passanger side head. It has a single wire coming out of it, right by the dipstick.

As for the trouble codes. I do not recall if it is pins A&B that need to be jumped on that ECU. I would try pins A&E, or pin A and the pin directly below it (pin H???)

scott in wa. · Posted: Wed Apr 05, 2006 11:35 am Post subject: adl

I saw a single wire sensor that goes there but It looks way different than the tpi car.

As far as the ADL, Iam almost positive its A and B terminals.
If so and there is nada there, what do you think?
Bad ecm??
Thanks
Scott

Dewey316 · Posted: Wed Apr 05, 2006 11:36 am Post subject:

I doubt it, I would guess something funky with the wiring, or with the SES light itself. If the ECM is "bad" it should give you a ECM error, or the SES light will flash very fast, all the time.

scott in wa. · Posted: Wed Apr 05, 2006 11:53 am Post subject: adl

Well I do get a ses light when I start the car, then it goes off, just like normal.
But, I have to say that’s only when I discovered there was no bulb in that socket., put one in and now it goes on when starting, it looks like the normal deal when starting a car.

I think I really like this stuff, man is that scary or what.....
Scott

Dewey316 · Posted: Wed Apr 05, 2006 11:57 am Post subject:

If it SES's when you key on, and drives normally. It sounds like it is fine. May I ask why you think the ECM is bad?

IIRC 88 was a funky year for TBI. I would be willing to bet that it may not be pins A&B to get it to spit out the fault codes.

scott in wa. · Posted: Wed Apr 05, 2006 12:34 pm Post subject: sure

Well I have been doing some searching and can't find anything specific on with and what to ground on the adl, but all seem to be A and B ground should give you a communication code 12. I thought. I will do some more searching.
Ya it runs ok but not great, and I guess the fan would be controlled not by the ECM but by the temp switch in the head and the pressure switch in the AC.

Just running all my thoughts through my tinny little head and posting here to bounce them off you guys and see what you think.
I like the help and need as much as I can get.
Keep it coming.
Scott

Dewey316 · Posted: Wed Apr 05, 2006 12:39 pm Post subject:

Yes, the fan is run thru the switch. The switch activates the relay, which turns the fan on. The sensor that the computer uses for temp, is located in the intake manifold, just to the passanger side of the t-stat. The temp gauge, uses the sensor between cyls #1 and #3, on the drivers head.

scott in wa. · Posted: Wed Apr 05, 2006 12:53 pm Post subject: yep

IPut a new relay in last night, the old one was burned or blackened a bit, but no help
Bought a new fan switch but it’s the one that looks like a coke bottle on the end on it. the one on the car is different,. Kind of weird. it takes a different connector.

Hey are A and B on the ADL up and down or side to side?