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Old 08-24-2010, 08:52 PM   #51
rfmaster
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

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Originally Posted by motornut View Post
my 1985 sub intake
That's one Rochester 220 TBI!!!! How did it manage to get into your '85???? I always thought that TBI was introduced on '87 and later?!

//RF
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Old 08-24-2010, 10:23 PM   #52
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

i found it when i bought it about 9 years ago........same as my 87 4x4 sub.Anything i've ordered or done was based on my 87.Now i need to read the frame numbers but i don't know where to look,can't find that info yet.And if this engine can't be in an 85 then i should be able to remove the rest of the smog stuff ........explains why i was told the etest was based on an 87.......now exempt after 20 years
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1987 Suburban4X4-writeoff hit while parked RIPzez
1988 Suburban4X4-writeoff hit while parked RIPzez
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2002 Fleetwood
2005 Malibu hit by City bus,2nd time a write-off(01/15/16)
2010 Dodge Van-writeoff hit while parked(01/14/15)

Now I just buy shorter trucks!
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Old 08-25-2010, 11:01 AM   #53
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

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Originally Posted by motornut View Post
i found it when i bought it about 9 years ago........same as my 87 4x4 sub.Anything i've ordered or done was based on my 87.Now i need to read the frame numbers but i don't know where to look,can't find that info yet.And if this engine can't be in an 85 then i should be able to remove the rest of the smog stuff ........explains why i was told the etest was based on an 87.......now exempt after 20 years
Looking at the photos it is clearly viable that you have centerbolt covers (post 86) , harness routing, bulkhead feed through grommet appear as factory like installation. I highly doubt that PO was this good to duplicate all these fine production line details. I hate to say but VIN swapping is more likely than not.

There should be A vin number stamped on frame (location - do not know)

//RF
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1975 Chevrolet C20 longbed
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TBI retrofit completed (2007-07-29)
New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17)
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Old 08-26-2010, 09:22 AM   #54
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

wondering if these marks are norm,i can see writing says eng change 51?Can't remember if my blues had all of those,i know it had some.check out the 3rd seat hookup.
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1978 Suburban4X2-hit while parked RIPzez
1978 GMCJimmy4X4-350/203http://67-72chevytrucks.com/vboard/s...=421767&page=4
1979 GMCJimmy4X2-305/350http://67-72chevytrucks.com/vboard/s...=1#post5200107
1987 Suburban4X4-writeoff hit while parked RIPzez
1988 Suburban4X4-writeoff hit while parked RIPzez
1989 Suburban4X2 - square igloo/SOLD
2002 Fleetwood
2005 Malibu hit by City bus,2nd time a write-off(01/15/16)
2010 Dodge Van-writeoff hit while parked(01/14/15)

Now I just buy shorter trucks!
Love em low,but get me higher

Last edited by motornut; 08-27-2010 at 10:40 AM.
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Old 08-26-2010, 09:29 AM   #55
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

I was under my 86 the other day and saw some numbers stamped in the frame on the passengers side, rear, up near where the upper shock mount is. I was putting shocks on it when I noticed it. I did not compare them.....

Im sure a square body expert will chime in here soon and tell us where the frame VIN numbers are located
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1980 Toyota Corolla "Rock-n-Rolla"
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, "Hot Rod"
1931 Ford Model A Tudor "Silverback"


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

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Time wasters, looky Lous and tire kickers are everywhere!

Last edited by 72freak; 08-26-2010 at 09:32 AM.
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Old 08-26-2010, 10:02 AM   #56
motornut
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

thanks i'll have peek there
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John http://www.youtube.com/user/TheMotornut
1978 Suburban4X2-hit while parked RIPzez
1978 GMCJimmy4X4-350/203http://67-72chevytrucks.com/vboard/s...=421767&page=4
1979 GMCJimmy4X2-305/350http://67-72chevytrucks.com/vboard/s...=1#post5200107
1987 Suburban4X4-writeoff hit while parked RIPzez
1988 Suburban4X4-writeoff hit while parked RIPzez
1989 Suburban4X2 - square igloo/SOLD
2002 Fleetwood
2005 Malibu hit by City bus,2nd time a write-off(01/15/16)
2010 Dodge Van-writeoff hit while parked(01/14/15)

Now I just buy shorter trucks!
Love em low,but get me higher
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Old 08-31-2010, 01:22 PM   #57
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

Quote:
Originally Posted by motornut View Post
thanks i'll have peek there
Did you find anything?

I plugged the 2 prong back in and there seems to be no difference.....still no check engine light though.
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2001 Chevrolet 2500HD Crew 6.0
1999 Chevrolet Tahoe 4x4
1999 Harley Davidson Electra Glide
1996 Chevrolet C3500 Ex-cab 5.7
1980 Toyota Corolla "Rock-n-Rolla"
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, "Hot Rod"
1931 Ford Model A Tudor "Silverback"


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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Old 08-31-2010, 03:19 PM   #58
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

nope cleaned and scraped /crud from behind the steering box to where it turns down, took a few picks,not seeing any numbers there,but a friend looked in asked if i had a fire?pointed above the booster to melted plastic holder,and harness going threw firewall.....not that i know of......
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1978 Suburban4X2-hit while parked RIPzez
1978 GMCJimmy4X4-350/203http://67-72chevytrucks.com/vboard/s...=421767&page=4
1979 GMCJimmy4X2-305/350http://67-72chevytrucks.com/vboard/s...=1#post5200107
1987 Suburban4X4-writeoff hit while parked RIPzez
1988 Suburban4X4-writeoff hit while parked RIPzez
1989 Suburban4X2 - square igloo/SOLD
2002 Fleetwood
2005 Malibu hit by City bus,2nd time a write-off(01/15/16)
2010 Dodge Van-writeoff hit while parked(01/14/15)

Now I just buy shorter trucks!
Love em low,but get me higher

Last edited by motornut; 08-31-2010 at 03:30 PM.
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Old 08-31-2010, 04:20 PM   #59
72freak
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

Ill get back under mine this week and find those numbers back by the shock mount and see if they match the VIN....
__________________
2001 Chevrolet 2500HD Crew 6.0
1999 Chevrolet Tahoe 4x4
1999 Harley Davidson Electra Glide
1996 Chevrolet C3500 Ex-cab 5.7
1980 Toyota Corolla "Rock-n-Rolla"
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, "Hot Rod"
1931 Ford Model A Tudor "Silverback"


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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Old 08-31-2010, 09:26 PM   #60
motornut
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

ok thanks
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John http://www.youtube.com/user/TheMotornut
1978 Suburban4X2-hit while parked RIPzez
1978 GMCJimmy4X4-350/203http://67-72chevytrucks.com/vboard/s...=421767&page=4
1979 GMCJimmy4X2-305/350http://67-72chevytrucks.com/vboard/s...=1#post5200107
1987 Suburban4X4-writeoff hit while parked RIPzez
1988 Suburban4X4-writeoff hit while parked RIPzez
1989 Suburban4X2 - square igloo/SOLD
2002 Fleetwood
2005 Malibu hit by City bus,2nd time a write-off(01/15/16)
2010 Dodge Van-writeoff hit while parked(01/14/15)

Now I just buy shorter trucks!
Love em low,but get me higher
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Old 09-01-2010, 10:08 AM   #61
motornut
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

Stopped at a gm dealer told no vin corisponding number on the frame.Called last owner said he loved it, glad to hear it's still goin(i've owned bout 10 years).said he heard about the vin issue when getting it serviced,wrong parts were ordered,but he bought it Missasauga Ont ,from a guy from texas,will try to find out if he has other papers on it,but doubts it.
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John http://www.youtube.com/user/TheMotornut
1978 Suburban4X2-hit while parked RIPzez
1978 GMCJimmy4X4-350/203http://67-72chevytrucks.com/vboard/s...=421767&page=4
1979 GMCJimmy4X2-305/350http://67-72chevytrucks.com/vboard/s...=1#post5200107
1987 Suburban4X4-writeoff hit while parked RIPzez
1988 Suburban4X4-writeoff hit while parked RIPzez
1989 Suburban4X2 - square igloo/SOLD
2002 Fleetwood
2005 Malibu hit by City bus,2nd time a write-off(01/15/16)
2010 Dodge Van-writeoff hit while parked(01/14/15)

Now I just buy shorter trucks!
Love em low,but get me higher
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Old 09-01-2010, 05:54 PM   #62
motornut
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

http://67-72chevytrucks.com/vboard/s...d.php?t=417457
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John http://www.youtube.com/user/TheMotornut
1978 Suburban4X2-hit while parked RIPzez
1978 GMCJimmy4X4-350/203http://67-72chevytrucks.com/vboard/s...=421767&page=4
1979 GMCJimmy4X2-305/350http://67-72chevytrucks.com/vboard/s...=1#post5200107
1987 Suburban4X4-writeoff hit while parked RIPzez
1988 Suburban4X4-writeoff hit while parked RIPzez
1989 Suburban4X2 - square igloo/SOLD
2002 Fleetwood
2005 Malibu hit by City bus,2nd time a write-off(01/15/16)
2010 Dodge Van-writeoff hit while parked(01/14/15)

Now I just buy shorter trucks!
Love em low,but get me higher
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Old 10-08-2011, 02:47 PM   #63
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

Ihave been haveing exactly the same problem,

I have an 86 c20 dually converstion. Check enginelight would come on on when I went over 55 then off every time i turned ignition off.
Now it stays on.
I have no plug for code reading under dash.
No obvious smog equipment under the hood.
Trucks runs fine other than needing a break seal replacement on the dually rear end.
All I want to know is that im not killingthe truck and that the check engine light is not coming on for a good reason like trans temp or oil pump failure etc.
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Old 10-08-2011, 09:12 PM   #64
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Re: HELP...1986 C20 5.7....smog removed,,,Check engine light???

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Originally Posted by kristian_dancer View Post
Ihave been haveing exactly the same problem,

I have an 86 c20 dually converstion. Check enginelight would come on on when I went over 55 then off every time i turned ignition off.
Now it stays on.
I have no plug for code reading under dash.
No obvious smog equipment under the hood.
Trucks runs fine other than needing a break seal replacement on the dually rear end.
All I want to know is that im not killingthe truck and that the check engine light is not coming on for a good reason like trans temp or oil pump failure etc.
Did you see post #29? Do you have the "smog pump control module" on the firewall?
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