New member here. Trying to figure out all I need to know on my project. I recently bought a big basketcase project off a guy who was in over his head. Basicly I have an 89 Iroc with a 305 TBI. Engine, ECM,and harness all removed ready for a complete 85 350 TPI. I just purchased an 88 350 TPI ECM last night. The TPI engine I bought came with a complete matching 85 harness I assume to be from an 85 corvette since the engine numbers came back as 85 corvette and it's a TPI harness.
Could you guys possibly help me on a few things?

-I may need another harness but not sure. 85 harness compatable with 88ECM?

- Fuel pump and lines need upgraded for more pressure to support TPI injection.

- Will I have any issues with the chip in the key working with my recently purchased 88ECM?

- lastly, is the 85 TPI engine compatable with the 88 ECM? I've heard talk about MAF and MAP changeovers ect...

I know this is alot to ask, I could spend forever searching past posts or just get it all out here on my own thread. If this has been covered before many times I appologize. I could really use some help. This forum seems to be the most edjucated I've found.

Thanks everyone and thanks in advance for any help or tips you might have for me.

 

Welcome aboard thirdgen.org.

I moved your thread to the TPI forum because your questions are more specifically related to the TPI system than an engine swap. You're more likely to get better answers more quickly here.

 

Thanks for the move!

 

Fuel lines work. Just putting that much info. I had TBI and my tpi hooked right up

 

That's good, I believe I still need a different pump assuming the low pressure TBI and the higher pressure TPI take a different pump. Did you change pumps? Thanks

 

you will need a higher pressure pump acdelco ep-241, your corvette harness will not just plug and play. you would be better off having the memcal reprogramed to a 89 tune without vats and rework your tbi harness. If you haven't purchased a maf you might want to rethink things and go with speed density. If the injectors have ben sitting around for a while contact south bay fuel injectors and get bosch 3 22#hr injectors. Its not worth spending your money for a cleaning on old injectors.

 

you will need a f-body fuel rail the corvette one goes towards the passenger side. . Your serpentine setup will bolt on to the vette engine but I dont think the passenger head was taped for all 3 holes.If you get a fuel rail get the hard line from a 88-92 tpi f-body as well. You can use the runners you have from the 85 but if you go maf you can buy a delete kit off ebay for the ninth injector and use the 89 programing or speed density does not make use of the csi.

 

Wow, tons of golden info, I need to try soaking it all in. I'm gettng the help I desperately needed. Definately found my home camaro forum.
Thanks!

 

[Tuned covered a lot. South bay is awesome. Great service and speed too. I had an 89 Maf engine to go into my 92. It was a preference of mine at the time. Think I just used a 92 tpi pump. Go ac delco like was suggested.

 

Alright, I've done alot of reading and searching to understand all you've said and I think I finally get it but heres my 2 questions if you don't mind.
Can I go 89 programming and speed density setup utilizing my TBI harness and my 88 ECM and PROM ( 01227165) or would I have to buy another ECM (1227730 out of a 90-92).

Secondly, does the speed density setup require a speed sensor?

I really need to utilize the ECM I just paid 100 bucks for unless I can find someone to swap it.

Thanks again for the help!

 

If you want to go speed density you will need to buy a 730 ecm or convert the 165 to run $12p. You can repin your harness and goto a junk yard and grab some injector plugs to graft onto your harness. I hope yo received a memcal with the 165 ecm for the 100 other wise thats a little much. Maf or sd you should use the vss signal for iac control.

 

https://www.thirdgen.org/forums/tpi/...d-density.html

 

Thanks, I actually read this entire thread earlier today.

I did get the 350 prom with the ECM. ( I just emailed the guy to see if he would trade me a 1227730 ECM if he by chance has one)

If your saying I can turn my 7165 into a 7730 for 12 dollars does that mean I have to send it somewhere or just buy a piece? I think that's my best bet at this point. I have a complete TPI harness from an 85 corvette I can cut the injector plugs out of and patch into my TBI harness. I can also buy an adapter for proper vss signal for 74 bucks.

Thanks!

 

Goto delco hacking for information on the $12p mask

 

Your tbi car already has a vss signal going to the ecm you can use that optical signal to a 165.

 

Now I really feel stupid, sent you a PM tunedperformanc.

 

Lol, its fine I will send you a pm back

 

Scored a complete F-body fuel rail, metal lines, and rubber hoses at the local PIC-A-PART today for a cool 15 dollars! (19.78 after tax and core). YAY!

 

It doesn't get any bettner than that

 

Getting ready to repin my harnesses (TBI harness to speed density TPI 730 ECM).

I printed the thread " Repinning TBI to speed density TPI".

I just have 2 questions.....

There are some posts in the middle of the thread about 1 or 2 incorrect repinning locations. Is the repinning table found in the 2nd post of the thread (last edited 6-13-2006 @3:35 pm) the final version I should use?

Secondly, the 730 ECM pin locations listed on the table are a little confusing to me. If for example the chart tells me A8 goes to BA8 that means A8 to A8?
Chart says C10 goes to GE16 so C10 goes to E16?
Chart says I can ground both injector grounds to engine block?

Hey, these might be obvious questions but I can't afford to do this wrong. Bettner safe than sorry.

If anybody could confirm I would greatly appreciate it. Thanks!

 

You have the repinning correct , the g or b if there is two letters the first would be for black connecter the g would be for the green connecter. The ecm controls the ground side of the injectors to fire them on c11 and c12 of the ecm.

D6 and D7 of the 730 ecm are the injecter driver ground and can go to the back of the engine block.

 

THANK YOU!

 

All done re-pinning with no issues other than having 4 extra wires I didn't use since they weren't listed on the chart. I'll just leave them hanging in the old plug.

 

cars are notorious for having extra parts on them that aren't needed

 

If you go with headers the wire that went to the esc power and ground would work great to tap into to hook up a heated o2 sensor.

 

I just purchased some used shorty headers with O2 sensor already installed. How do I figure out if it's heated or non heated? I would assume it's stock but not sure.

 

Shorty headers usually get the o2 hot enough to function. Mid length and long tube usually have the o2 mounted down stream more. If the o2 doesn't reach 5-600f it will not become active and go into closed loop. You can install a acdelco afs-74 o2 and build a pigtail to reach the o2.

 

I just caught something, you must mean an 87 or later 350TPI. There was no 350 in '85. Or maybe the previous owner was putting the TPI from an 85 on a later long block? Be careful that the intake matches the heads and that the heads match the block just in case. The 305 had 58cc chambers while the 350 had 64cc chambers. putting iron 305 heads on the 350 will raise compression past the safe point for cast iron heads on 91 octane. The 85 intake manifold won't bolt up to 87 or later heads without modifications.

 

It's already a complete engine, I was told it was a 350 out of an 85 corvette so I ran the numbers on the block and it came back an 85 350 out of a corvette.

 

Thanks for the link. I might do this soon.

 

That makes sense. Wasn't thinking of the Vette 350.

 

I just got er fired up! Open headers and she sounds friggin mean! Got some bugs to work out (check engine light and completely dies out if I try to give it throttle. I'm guessing the fuel pump I was HOPING came from a TPI is actually a TBI low pressure pump. It idles smooth and sounds great, just won't rev up AT ALL.

 

if you have a tbi pump in there I'm surprised it was idling , Nice progress

 

Well the CEL was a code 22 (TPS low voltage) so I found one of the weatherpack plug prongs was damaged and pushed out so I fixed it and reset ECM. No more CEL light and I revved it up a few times. sounded good for a few revs and idled down and died....... wouldn't idle anymore and now having a hard time even getting it to fire at all. takes right off for a few seconds with a shot of starting fluid though. I'm really scared the injectors might of got clogged up since before hooking up fuel lines I flushed about 1/2 a teaspoon of crap out of the fuel lines ( filled up a clean white plastic cup about about 6-7 times until gas came appeared clean THEN hooked up the lines. My guess is it's either it's acting wierd because of fuel pressure or I just screwed up my brand new injectors. Gonna try to find a high pressure pump tomorrow and see what happens. Can't afford a fuel pressure test kit rental at the moment.

 

After you get things straightened out and can warm up the engine adjust the timing to 6 dbtdc followed bye setting the minimum idle speed and readjust the tps to 0.660VDC to 0.760VDC on the blue wire on the tps and ground.
http://www.iroczone.com/2009/10/adju...ir-idle-speed/

 

Well I think I might of had the right fuel pump to start with but I changed it anyway. While I was changing it I noticed the TBI rubber hose I had installed was spilt and blown out. I installed pump I got from the junkyard today and replaced blown rubber hose with that factory dampener thing and she's alive again.

Only bad thing now is I got another CEL and guess what.... code 22 again. I checked plug and my repair from last night and it looks good. Reset ECM again and it came back on after running a few seconds. I either pinned something wrong on my harness or need a new TPS. Gonna see if anyone has one in the classified section.

 

Did you raise the feedback voltage bye adjusting the tps yet ?

 

Not yet, i was going to correct CEL before I did that. Are you saying that adjustment being needed could be the cause of the CEL?

 

If the ecm sees a low tps feedback voltage the code 22 will throw. Tpi speed density did not have a adjustable tps like tpi maf. you can still use your tps just adjust the voltage on the blue wire with your key turned on to .66-.76 vdc and then disconnect the battery for a few minutes and see if that takes care of the code.

 

Interesting, cool, and thanks again! I'll get it adjusted tonight and let you know if it fixes it.

 

Unbelievable! It's fixed! You da man!Now on to permenant routing of spark plug wires, antifreeze, and base timing check.

 

 

Ok so I have a 88 firebird formula 5.0, I just bought a 350 vortec out of a 99 Yukon ... It's fuel injected, my problem is I bought it because the cover over my filter says "FUEL INJECTION" , but everyone is telling me that my year firebird is carbureted and will cost a lot to swap it or change intakes, can someone please reassure me that this will be a "SIMPLE" swap. Thanks - kush @over the limit CC

 

A little fun fact on my swap. The corvette drivetrain I'm swapping in had a matching corvette tranny, after swapping tailshafts thinking that's all I needed to do I went to bolt up up the trans crossmember and NO BOLTHOLES IN CASE FOR MOUNT!

I improvised and fabricated a 1/4" peice of angle iron, clearanced and drilled it , bolted it to the 2 lower tailshaft mounting bolts, then welded the mount directly in place after mockup. Not a plug-n-play tranny but it makes mine just that much more special.



Kush Barnes, You might copy and paste your post and start a new thread, you'll probably get alot more hits.

 

Thanks

 

OK I road tested today and it's a beast! I set another trouble code however.... code 24 ( no VSS signal). I read something about a buffer boxmaybe in the cluster?

Anyone know what ecm pin I need to hook to what?

 

The brown wire that went to your tbi A10 gets repined to the optical input pin C6. I believe I marked the memcal optical vss.

 

I haven't pulled ecm back out yet but I'm 99.9999% sure it's pinned correctly. I checked the chart I used and it's right. I'll pull ecm tomorrow to see if I have a brown wire in C6.

 

Look at your other thread you pulled a switch a roo on me lol

 

Just got the right throttle cable installed. Now I have 100% throttle linkage travel and proper TV cable operation......... WWWWEEEEEEEEEEEEEEE!!!!!!!!