94 lt1 problem in a 96 roadmaster

**bigontray** · 01-12-2017, 08:16 PM

On a buick roadmaster you can run diagnostic codes through your climate control you dont need a scaner

**bigontray** · 01-12-2017, 08:27 PM

O yea I think I figured it out so the mechanic said it ran for 3 min the bogged out like it died of gas when I thought of that I figured hey run diagnostic codes through the climate cintrol and I got under secti9n 03.... the codes were 61 , 62, 161, and 162 which pretty much all said fuel and stuff. So u pulled the fulle rail and injectors and saw a tinnnnny bit of gas leak down the 3 injector..... put a rag und 1 , 3 and , 5 and 7 and cranked car no fuel on rags. So I pulled rags to see if I saw any on engine manifold cranked car saw none.. so I pulled the 3 injector and boom gass cam gushing out the rail.. I have come to the conclusion that the little kicks id hear when I open throttle to wide open was the little tiny bit of gas droppung. So I am going to swap fuel rails since I cant get my 96 injectors into my 94 fuel rail. But I need help figuring out how to get the fuel li e hoes off the rail... can anyone help...

Originally Posted by Injuneer

On the ICM, pins A and D are 12V DC, supplied by a fuse. Check the fuse. On an F-Body it's under the hood... don't know about the B-Body.

Pin C is a ground. It should not have any voltage on it (if you put one lead of the meter on pin C, where did you put the other lead?). Measure ohms from pin B to a good ground. Should read close to "0" (key off).

Pin B is the pulse signal from the PCM that tells the ICM to fire the coil. Did you measure it with the engine cranking? You have to measure that with the AC Volts scale. What value did you get?

http://shbox.com/1/4th_gen_tech2.html#opti_test

What year PCM are you using? 2-digit codes would appear to be OBD-1. OBD-2 are 3- and 4-digit codes.

How did you put the PCM in diagnostic mode? What scanner did you use? DTC 61 is for the A/C system, there is no DTC 62 for an F-Body, is there one for a B-Body?

***SSlowBoat*** · 01-12-2017, 10:03 PM

Originally Posted by bigontray

O yea I think I figured it out so the mechanic said it ran for 3 min the bogged out like it died of gas when I thought of that I figured hey run diagnostic codes through the climate cintrol and I got under secti9n 03.... the codes were 61 , 62, 161, and 162 which pretty much all said fuel and stuff. So u pulled the fulle rail and injectors and saw a tinnnnny bit of gas leak down the 3 injector..... put a rag und 1 , 3 and , 5 and 7 and cranked car no fuel on rags. So I pulled rags to see if I saw any on engine manifold cranked car saw none.. so I pulled the 3 injector and boom gass cam gushing out the rail.. I have come to the conclusion that the little kicks id hear when I open throttle to wide open was the little tiny bit of gas droppung. So I am going to swap fuel rails since I cant get my 96 injectors into my 94 fuel rail. But I need help figuring out how to get the fuel li e hoes off the rail... can anyone help...

Yeah, it's called a 3/8 and 5/16 fuel line disconnect tool.....

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**Injuneer** · 01-12-2017, 10:58 PM

Originally Posted by bigontray

O yea I think I figured it out so the mechanic said it ran for 3 min the bogged out like it died of gas when I thought of that I figured hey run diagnostic codes through the climate cintrol and I got under secti9n 03.... the codes were 61 , 62, 161, and 162

....help...

But section -03 is for SIR (airbag) system according to this reference:

http://buickforums.com/forums/archiv...p/t-10691.html

Also appears the 1 in front of the 2-digit code means history code.

I really want to learn more about this diagnostic system, because I've never seen it before.

**bigontray** · 01-13-2017, 09:58 AM

I went back and double checked but im going back to car to runn all codes. But yea you just hold the off button and temp up and the climate control shows you your diagnostic codes.

**bigontray** · 01-13-2017, 09:59 AM

And apparently I can check the temps of all sensors and checj my rpm since roadmasters dont have a rpm tach and I guess I can check my mph if that tach goes out.

**bigontray** · 01-13-2017, 12:00 PM

Ok guys I put the old injectors back in and cranked it but still saw no gas coming coming out onto the rag but I see gas on floor when I cranked it without the injectors olugged into harness and I see it all over the line going to the fuel rail so today I will swap covers and hopefully that gets it.

Originally Posted by Injuneer

On the ICM, pins A and D are 12V DC, supplied by a fuse. Check the fuse. On an F-Body it's under the hood... don't know about the B-Body.

Pin C is a ground. It should not have any voltage on it (if you put one lead of the meter on pin C, where did you put the other lead?). Measure ohms from pin B to a good ground. Should read close to "0" (key off).

Pin B is the pulse signal from the PCM that tells the ICM to fire the coil. Did you measure it with the engine cranking? You have to measure that with the AC Volts scale. What value did you get?

http://shbox.com/1/4th_gen_tech2.html#opti_test

What year PCM are you using? 2-digit codes would appear to be OBD-1. OBD-2 are 3- and 4-digit codes.

How did you put the PCM in diagnostic mode? What scanner did you use? DTC 61 is for the A/C system, there is no DTC 62 for an F-Body, is there one for a B-Body?

**atlantadan** · 01-14-2017, 07:45 AM

So with the injectors plugged in to the rail and harness, the injectors don't pulse/pass fuel, and when they are disconnected from the harness - the injectors pulse? Just trying to clarify..