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08-16-2010, 11:38 PM | #26 |
78K & 79C Jimmys
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
yup it's my 85
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
08-17-2010, 12:32 AM | #27 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
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08-17-2010, 07:29 AM | #28 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
my fuel pump relay is there on my firewall,whats all the wires on the right?looks like fun there
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
08-17-2010, 05:05 PM | #29 | |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
Quote:
Stock true dual exhaust with no Y pipe, no cats and no O2 sensor. It is very obvious this is the original exhaust by the shields all over the pipes. Absolutley no computer behind the glove box.
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2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! It's not just a hobby..It's a LIFESTYLE!!! Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere! |
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08-17-2010, 07:25 PM | #30 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
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08-19-2010, 05:49 PM | #31 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
mine or his dosn't look 85
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
08-19-2010, 09:07 PM | #32 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
I think he means yours....with that fuel pump relay I believe it should be a throttle body that started in 87....Thats probably what he is talking about.
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2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! It's not just a hobby..It's a LIFESTYLE!!! Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere! |
08-19-2010, 10:42 PM | #33 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
Well i was told it was a diesel when bought new.but vin says 454 2 wheeler and it's C20-4X4
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
08-19-2010, 10:48 PM | #34 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
http://67-72chevytrucks.com/vboard/s...d.php?t=416576
FYI is another 85 not sure if he's tbi too tho,i just asked him
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
08-19-2010, 11:38 PM | #35 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
I have never seen a 85 chevy/gmc C/K/S/T/M platform have TBI. Even the 85 4.3s had feedback Quadrajets on them.
Last edited by clinebarger; 08-19-2010 at 11:42 PM. |
08-20-2010, 01:22 AM | #36 | |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
Quote:
//RF
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"The Beast" 1975 Chevrolet C20 longbed 350/700R4! with 3inch body lift Dual Flowmasters Super 40's! TBI retrofit completed (2007-07-29) New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17) |
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08-20-2010, 07:20 AM | #37 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
I'll get prettier pics this weekend if you want,but the 85 tbi etc was all matching my 87 that i had.I've only since finding this site i've explored rpo's and vin #s,and yes as you say it shouldn't be(just read to do it u have to shave bolts and other stuff?)........So when i turn the key i shouldn't hear the fuel pump humpin,before startin, should be manual pump?And no wires in there either.hmmmm
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 Last edited by motornut; 08-20-2010 at 07:22 AM. |
08-20-2010, 07:40 AM | #38 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
would i have the computer above the glovebox with out tbi,as it would seem it was born with a 454 but sadly it was removed.replaced with a 350........i am asumming the puters don't interchange....i figured the 2x to 4x4 frames/driveline were changed.........but to change the rest?Got any ideas how i would check/know........i posted/started some pics in a build thread...........16 inch tires if i read right?
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 Last edited by motornut; 08-20-2010 at 07:52 AM. |
08-20-2010, 11:00 AM | #39 | |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
Quote:
//RF
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"The Beast" 1975 Chevrolet C20 longbed 350/700R4! with 3inch body lift Dual Flowmasters Super 40's! TBI retrofit completed (2007-07-29) New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17) |
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08-20-2010, 01:45 PM | #40 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
Have you run your VIN to confirm its year?
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2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! It's not just a hobby..It's a LIFESTYLE!!! Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere! Last edited by 72freak; 08-20-2010 at 01:45 PM. |
08-20-2010, 02:16 PM | #41 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
yup checked the vin year is right.ownership says C20
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
08-21-2010, 03:30 AM | #42 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
That box above the heater/ac box is the computer (ECM). You will need to change out distributors to an older pre-81 HEI and if carb has wires for mixture it will need to be changed.
Also in pic looks like your heater/ac diverter valve is broken. http://67-72chevytrucks.com/vboard/s...diverter+valve Last edited by HOGDADDY; 08-21-2010 at 03:30 AM. |
08-21-2010, 11:31 AM | #43 | |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
Quote:
//RF
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"The Beast" 1975 Chevrolet C20 longbed 350/700R4! with 3inch body lift Dual Flowmasters Super 40's! TBI retrofit completed (2007-07-29) New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17) |
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08-22-2010, 07:33 AM | #44 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
OK.........There were two plugs in the bottom of this "smog pump control module". One plug has about 5 wires and the other has 2 wires. I unplugged both sets and the check engine light as mentioned above has NOT come back on. I have watched the truck closely and everything seems to work correctly.
Anyone know what these 2 plugs route to? The 5 wire and the 2 wire?With the info given above Im sure its all smog related but thats a lot of wires for just the smog system. I want to make sure I dont unplug something needed.
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2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! It's not just a hobby..It's a LIFESTYLE!!! Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere! Last edited by 72freak; 08-22-2010 at 07:38 AM. |
08-22-2010, 08:38 AM | #45 | |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
Quote:
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Project #1 "Pops"--1980 Chevrolet Scottsdale C10 3rd Generation in the same original owner family. GOAL: Restore to "almost" original. View Project Pops HERE Project #2 "Cletus"--1986 Chevy K20 4.10 Gear Ratio GOAL: Restore into a heavy duty work/plow rig View Project Cletus HERE - SOLD DD--2008 Duramax CCSB |
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08-22-2010, 05:20 PM | #46 | |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
Quote:
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2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! It's not just a hobby..It's a LIFESTYLE!!! Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere! Last edited by 72freak; 08-22-2010 at 05:21 PM. |
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08-23-2010, 10:11 AM | #47 | |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
Quote:
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08-23-2010, 11:39 AM | #48 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
WOW....great info.....I guess you just confirmed the smog stuff DOES run through the check engine light!!!!!
I am going to plug the 2 wire back in and see if I notice anything.
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2004 Chevrolet Suburban C1500 2001 Chevrolet 2500HD Crew 6.0 1999 Harley Davidson Electra Glide 1972 Chevrolet C-20 Custom Camper "Dump Truck" 1972 Chevrolet C-20 Suburban "Big Green" 1969 Chevrolet C-50 Wedge Hauler "Leonidis" 1966 C-10 2x4 short fleet 327 4 speed "Race Truck" 1952 Plymouth Cranbrook "Rican" (my grandfathers) 1931 Ford Model A Coupe "Black Beauty" 1930 Ford Model A truck "Club Cab" 4x4 Rottenwood Garage and Speed Shop.....where everything must be racy! It's not just a hobby..It's a LIFESTYLE!!! Thanks for nothing Barrett-Jackson You cant fix stupid or teach accountability! Time wasters, looky Lous and tire kickers are everywhere! |
08-24-2010, 11:41 AM | #49 |
78K & 79C Jimmys
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
The pic i took while i was repairing the heater core and that valve,i use it to show why the air box don't work right,and where it would/how it would be broken,and where the ECM is .........and i too hope to be smog free
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
08-24-2010, 07:25 PM | #50 |
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???
my 1985 sub intake
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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