Junkyard Tuned Port Injection For AMC 360

[ThisGuyUKnow]

Good thread. You have a long road ahead of you though. Few things...

I'm surprised you didn't rework a PROM just for initial firing given how far the timing table is off. 10 CIs is negligible, and displacement is just one tiny variable in a system of many. The biggest problem I see for you is that the spark tables will be way off for your AMC cast iron heads vs. the performance (at the time) aluminum heads on Corvettes of early 90's vintage. If the injectors aren't stock for a 350 Chevy or close, your fuel tables will be off as well.

The vette timing table is probably not quite aggressive enough at high loads (the aluminum heads need way less total timing) but WAYYY too aggressive at medium/low loads, i.e. where you drive the most. Lots of newbs to tuning think they can swap in vette tables only to discover they get almost constant knock counts and retard under any sort of engine load. So the current table needs to go.

Try to find a spark table from a bin from an application with non-swirl port, non-fast burn, cast iron heads as a starting point. like the 84 vette maybe. IIRC they started going aluminum in 86 (there was no 85) and thats when the tables started changing a lot vs. the stuff from the early 80s. Even the 84 table will probably need to be dialed down a bit but it should be much much closer than what you have now.

Now this timing issue is being exacerbated because you are currently at 10BTC as you describe it. I assume static w/ the proper lead disconnected, and not while the motor is running under ECM timing control at idle, right? The bin is probably "expecting" 0-6BTC, so all your timing is up to 6 degrees more advanced now, and the timing was already way over the top for your heads. The ECM can't measure timing, except relative to where it thinks you have the distributor bolted down. It expects the static timing configured in the BIN matches that of the distributor and makes all its timing decisions based on that assumption. You need to fix this first. If you need any tuning advice shoot me a PM. I'm pretty sure I have some iron smog head bin files around you can use as a starting point.

I think I have a little more insight one what was going on with the Timing. I got almost everything in its permanent situations today and was able to run the engine long enough to put a timing light on the engine. I initially set it the crank to 10 BTDC when I got the light on it, it was sparking after TDC. I rotated the diz until it was just before the 5 BTDC. Im not sure why the timing was so retarded when I lined it up with the dizz pickup but My theory is that it has something to do with the lock out of the vac and mechanical advance on the dist. I followed the bustedjeep TBI thread on how to lock out the diz and I am thinking that maybe that has something to do with it.

It is all set by the timing light now so should be good to go. Next step is to get an exhaust installed with the o2 sensor bung so I can get some good readings.

 

[ThisGuyUKnow]

Well I am not feeling to good about the project currently. I finally got the jeep back from an exhaust shop. What sucks is I was driving the jeep to move it around the yard no problem and I towed it to the shop and started it no issues and drove it into a parking spot. The mechanic said that it wouldnt start when they tried to pull it into the shop so they had to push it. No idea what could have changed in 3 days of just sitting.

Then he told me after it was done they were able to drive it out. I thought phew ok good to go. When I got there the mechanic said it doesn't run well. Which I thought yeah fair enough it needs programming. Well he wasn't kidding I started it and it drives way way way worse than it did when I brought it in. I don't know if it is because its like 15 degrees out or what but it drove fairly decent two weeks ago and now it has no power, shakes like crazy, and feels almost like you are trying to start off in 5th gear.

Im just getting a little frustrated, as the project seems to be going backwards and it is a little to cold for me to be doing diagnosis since I dont have a garage to work out of.

 

[jeepboy45]

this is an great site and has an incredible amount of information on it...

I've been thinking about the same project for a while, but just recently opted to go TBI...

But check this out...

Step By Step Real World Build Up!!!! STOP--READ FAQ FIRST - Binder Planet Forums

 

[ThisGuyUKnow]

Still no dice on the project. I have checked everything I can think of and it just wont start. I thought after the exhaust install it would be time to get into the tuning but for some reason it got worse and I am left scratching my head and unable to work on the truck in this cold weather.

Its just so weird how it ran fairly strong and then just sputtered off an died. Seems like a problem I'd expect with a carb.

 

[ThisGuyUKnow]

Ok so I have this project back on the reservation. Today just as I was calling it a day I got the engine to fire and idle. Not sure what the problem was after all these months of trouble shooting but over the course of this ordeal I changed the plugs, the Ignition module, the MAP sensor, pulled the dist and reset the timing a thousand times and replaced the ECM.

When it fired up today i found that my timing was way too advanced, So either something is up with my timing mark location/chain or I really need to revisit my ESC mod to the HEI dist.

My theory is that somehow the exhaust show fried the vette ecm while welding the pipe, since my first reaction was to reset the timing I must have been way off so when I did all my other trouble shooting it still wouldnt fire. Just a bunch of compounding issues.

Now that it is running I will set the timing by the light and make sure everything is working right. Then I will swap back in the original ecm and see if it works or if dies again.

 

[ThisGuyUKnow]

Some of these pics are repeats but here are some pregression shots and info I posted on IFSJA:


I seem to be having alot of trouble with the timing. When I set the timing via hand, it seems to put me almost 90 degrees out from where it should be. For any of you guys who are further along in chevy hybrid systems, is it possible that I may have locked a retard or advance into my dist in the process of locking it out? (its the same process as the TBI kits).

Here are some more pics of the TPI setup. The Vette donor lacked a true pdc, apparently the rlys are just strewn throughout the engine and the cab, so I used a cheap fuse center and stackable rlys I found on ebay. I think in a few weeks when the snow clears up a bit I am going to rob a PDC off a 4.0 cherk at the boneyard (why a 4.0? Just because it could be any pdc) and do some major rewiring to move all the relays fuses and stuff into one spot.
this is the mess I started with notice the gas can, that is incase I get really frustrated with the jeep project. Im surprised I haven't burned the jeep to the ground yet to be honest.
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20130921_180937_zpsde8a46b4.jpg.html"][/URL]

The ball of wire was the every growing pile of unused wire
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20130918_174109_zps0c46f173.jpg.html"][/URL]

All ECM wires isolated
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20130921_180926_zps4264a55c.jpg.html"][/URL]

Wires labeled and bundled pas on function (IE grounds, power, sensors, aldl)
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20130921_212118_zps2d7d21fe.jpg.html"][/URL]

Generic pic of stuff coming out of the factory harness, looks like the ICM from the driver fender in this pic
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131004_182756_zps81f8871a.jpg.html"][/URL]

Intake removed
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131005_103159_zps82cf635c.jpg.html"][/URL]
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131005_170203_zpsfade279b.jpg.html"][/URL]

Intake Dropped on, Didnt do enough research or fully appreciate how much of a gap would be between the intake and the block so I had to pull it off and build up a good rtv seal. Also a note, I could not get the dange Torque wrench in to most of the bolts. Luckily I realized that the open of of a 1/2 inch wrench would fit the 1/2 torque wrench, not sure how other people solve this issue.
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131005_141916_zpse7948f12.jpg.html"][/URL]
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131005_132224_zpse889dee3.jpg.html"][/URL]
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131005_124007_zpsa25f6eac.jpg.html"][/URL]

Crazy engine spaghetti, I swear I know where everything goes!
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131005_170217_zps00015ad9.jpg.html"][/URL]

Engine Spaghetti Cleaned up
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131103_113728_zps019d5d39.jpg.html"][/URL]

HEI modded for ESC
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131023_1846221_zps37c2a35d.jpg.html"][/URL]

Relay center and Fuse block. This I am going to try and do better with a 4.0 donor but it will do for now. There is are 2 fan rlys, fuel pump rly, and 2 unused rlys that I added just incase I wanted to do the relay bypass for the head lamps.
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131105_170926_zps76ba8190.jpg.html"][/URL]

The configuration all together, I couldnt find a post that would work with the modified TBI body so I eventually just grabbed a generic air filter from the parts store and drilled a hole through it to fit the post. Not the cleanest solution but it will do for now.
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131110_144040_zps312452ff.jpg.html"][/URL]
http://s88.photobucket.com/user/Thisguyuknow/media/AMC%20360%20TPI%20Project/20131110_144033_zps2f71720d.jpg.html"][/URL]

 

[mtnwhlr]

All I can say is WOW

 

[ThisGuyUKnow]

All I can say is WOW

Dont be too terribly impressed, it idles pretty crumby and is running incredibly rich