It's a riddle

sarge · 05-02-2007, 08:57 PM

I thought so , Jacobs rig is my old one , it ran great with a quadrajunk on it so I know it's a FI problem. He sure could use some help on this one , and I really want to see the old girl on the trail. You rarely ever get to see your vehicle in action and not be behind the wheel.

Hybrid · 05-03-2007, 10:39 AM

Yes, I am out of ideas. i really want this thing running right! I have purchased all the sensors i replaced from NAPA. I have replased the ingnition coil in the distributor, the oxygen sensor (which now that I think about it, that one was from Autozone), and i replaced the knock sensor, which was from NAPA. Mike F. if you think you can fix it that would be great!! Send me your info and lets talk. Thanks so much for all the help so far!

Jacob

Mike F · 05-03-2007, 04:23 PM

What model ecm do you have? I just need the last 4 digits of the number. If they are 7747 I can program that one, if it is another number I may only be able to hook into it and see what is going on depending on year and model and what is left of the harness ;)

Ignition COIL in the distributor? If that is true it sounds like it is a car setup and a early one at that, what exactly do you have? We may have to go through it bit by bit to make sure it all matches somewhat.

sarge · 05-03-2007, 11:08 PM

Mike , I will start listing the parts that I sold him with the rig :

I got the intake and TBI off of a suburban with a 350 in it , it had a Holley TBI unit on it ( I guess Jacob found it was bad ) . I can't remember the year , but I would say it was early 90's .

Jacob ,
just to make sure , get the numbers off of the block , I never second guessed the guy I bought the K-5 off of as to it truely being a 350 , it may be a 305 and this would cause problems .......

Mike F · 05-04-2007, 04:43 PM

sarge, Did you pull the entire TBI system off the suburban?

I have the casting numbers for chevy V8s up to 86. At some point after that GM started to cast the displacement litre size (like 5.7) into the same spot as the casting numbers on the rear top of the block in front of the trans.

Hybrid, We also need to ID the replacement TBI you picked up to replace the bad holley TBI.

I can trace some of the numbers for some of the original GM parts. I can only read the info off the chip for the 7747 ecm to see what it is but it realy doesn't matter for that one because I can change it if need be.

sarge · 05-04-2007, 10:04 PM

the intake and TBI were already off the burb sitting inthe rear seat , I pulled the ECM out from under the dash and I can't remember is I found the dist. or not . The guy I got the K-5 from worked at GM and told me that he blew the 305 and put a crate 350 in it a few months before I got it . It looked like the standard Mexican 350 with the perimeter bolt valve covers that you can get for like $1400.00 .

The burb ( if I remember correctly ) was not the old square style ( 80's ) but more like a 90's . I have a 90 and it was still the square style so I don't know when they changed. I think the ecm is the 7747 , I think I checked when I was going to order a harness.

Hybrid · 05-06-2007, 01:40 PM

The number on the ECM is 1228747. Where on the block is the number for the motor? That motor might very well be a 305, b/c i bought a new 350 harmonic balancer for it and I can not get it to TDC for the life of me. The coil i replaced in the distributor was a little plastic thing with copper wire coiled around it. It sat underneath the rotor button and it was connected to the sensor in the distributor.

05-03-2007, 04:23 PM	#3
Mike F EFI AMC 360 Join Date: Mar 2007 Location: New Lebanon, OH Posts: 32	What model ecm do you have? I just need the last 4 digits of the number. If they are 7747 I can program that one, if it is another number I may only be able to hook into it and see what is going on depending on year and model and what is left of the harness ;) Ignition COIL in the distributor? If that is true it sounds like it is a car setup and a early one at that, what exactly do you have? We may have to go through it bit by bit to make sure it all matches somewhat. __________________ 89 YJ EFI AMC 360, T18a, D20, built D44, 14 bolt, 38" Creepy Crawlers.

05-04-2007, 04:43 PM	#5
Mike F EFI AMC 360 Join Date: Mar 2007 Location: New Lebanon, OH Posts: 32	sarge, Did you pull the entire TBI system off the suburban? I have the casting numbers for chevy V8s up to 86. At some point after that GM started to cast the displacement litre size (like 5.7) into the same spot as the casting numbers on the rear top of the block in front of the trans. Hybrid, We also need to ID the replacement TBI you picked up to replace the bad holley TBI. I can trace some of the numbers for some of the original GM parts. I can only read the info off the chip for the 7747 ecm to see what it is but it realy doesn't matter for that one because I can change it if need be. __________________ 89 YJ EFI AMC 360, T18a, D20, built D44, 14 bolt, 38" Creepy Crawlers.

05-02-2007, 08:57 PM	#1
sarge Pure Bacon Join Date: Jan 2007 Location: Trenton, Oh Posts: 1,098	I thought so , Jacobs rig is my old one , it ran great with a quadrajunk on it so I know it's a FI problem. He sure could use some help on this one , and I really want to see the old girl on the trail. You rarely ever get to see your vehicle in action and not be behind the wheel.

05-03-2007, 10:39 AM	#2
Hybrid Join Date: Mar 2007 Location: Fairfield, OH Posts: 134	Yes, I am out of ideas. i really want this thing running right! I have purchased all the sensors i replaced from NAPA. I have replased the ingnition coil in the distributor, the oxygen sensor (which now that I think about it, that one was from Autozone), and i replaced the knock sensor, which was from NAPA. Mike F. if you think you can fix it that would be great!! Send me your info and lets talk. Thanks so much for all the help so far! Jacob

05-03-2007, 11:08 PM	#4
sarge Pure Bacon Join Date: Jan 2007 Location: Trenton, Oh Posts: 1,098	Mike , I will start listing the parts that I sold him with the rig : I got the intake and TBI off of a suburban with a 350 in it , it had a Holley TBI unit on it ( I guess Jacob found it was bad ) . I can't remember the year , but I would say it was early 90's . Jacob , just to make sure , get the numbers off of the block , I never second guessed the guy I bought the K-5 off of as to it truely being a 350 , it may be a 305 and this would cause problems .......

05-04-2007, 10:04 PM	#6
sarge Pure Bacon Join Date: Jan 2007 Location: Trenton, Oh Posts: 1,098	the intake and TBI were already off the burb sitting inthe rear seat , I pulled the ECM out from under the dash and I can't remember is I found the dist. or not . The guy I got the K-5 from worked at GM and told me that he blew the 305 and put a crate 350 in it a few months before I got it . It looked like the standard Mexican 350 with the perimeter bolt valve covers that you can get for like $1400.00 . The burb ( if I remember correctly ) was not the old square style ( 80's ) but more like a 90's . I have a 90 and it was still the square style so I don't know when they changed. I think the ecm is the 7747 , I think I checked when I was going to order a harness.

05-06-2007, 01:40 PM	#7
Hybrid Join Date: Mar 2007 Location: Fairfield, OH Posts: 134	The number on the ECM is 1228747. Where on the block is the number for the motor? That motor might very well be a 305, b/c i bought a new 350 harmonic balancer for it and I can not get it to TDC for the life of me. The coil i replaced in the distributor was a little plastic thing with copper wire coiled around it. It sat underneath the rotor button and it was connected to the sensor in the distributor.