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04-15-2018, 11:53 AM | #1 |
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Need emissions help
Hello, have 1990 Silverado 1/2 ton, 2 wheei drive, 350 engine, extended cab.
Smog pump missing off this truck and won't pass inspection in my state, only requires safety inspection but if it came with pump has to have it on there. Willing to buy one but don't know if im missing what ever the pump connects to so i've been searching everywhere for a diagram of the emmissions system for my truck with no luck, have found a couple that supposedly are for my truck but it shows it with the air injection pipes that screw into the heads like the 80s model trucks and these models didn't have those, even my Chilton manual doesn't show mine. Does anyone have a diagram or know what the pump attaches to? 1988 to 1993 are the same, 1994 and newer are different. Thanks for any help. |
04-15-2018, 03:09 PM | #2 |
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Re: Need emissions help
This is from a 1993 fuel & emissions manual.
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For those of you that are wondering why you are not getting replies to your thread: Did you give the model, year, engine, fuel system type, and transmission information? If it is modified from what came stock from the factory, let us know that too. Last edited by ChevyTech; 04-15-2018 at 03:26 PM. |
04-15-2018, 03:21 PM | #3 |
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Re: Need emissions help
I edited my post to only have one photo at a time because with some browsers this site messes up multiple photo posts.
These are from the 1993 Fuel & Emissions Manual.
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For those of you that are wondering why you are not getting replies to your thread: Did you give the model, year, engine, fuel system type, and transmission information? If it is modified from what came stock from the factory, let us know that too. Last edited by ChevyTech; 04-15-2018 at 03:30 PM. |
04-15-2018, 03:32 PM | #4 |
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Re: Need emissions help
Another from the 1993 manual.
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For those of you that are wondering why you are not getting replies to your thread: Did you give the model, year, engine, fuel system type, and transmission information? If it is modified from what came stock from the factory, let us know that too. |
04-15-2018, 06:12 PM | #5 |
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Re: Need emissions help
I don't understand this requirement. I have a Calif. truck and it never had an AIR pump. Calif. was typically the state that required equipment like AIR so I don't know why NC would need it. Do you have exhaust manifolds where someone put plugs in pipe holes or are they bare of those ports.
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1989 K1500 Chev. EC Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit. 2009 Hummer H3T 3.7L 5M (sold) 1997 K2500 Chev. EC 7.4L/ 4L80E 2018 Dodge Ram 2500 HD R/C |
04-15-2018, 07:37 PM | #6 | |
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Re: Need emissions help
Quote:
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04-16-2018, 09:00 AM | #7 |
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Re: Need emissions help
If 76r could post a picture, showing the lower passenger area... Then we can see what is missing - needed. ( Is the smog mount bracket there?)
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'70 GTO Midnight Blue '88 GMC Sierra SLE 392,000 miles-(2018) sold to Classic car shop in Germany. '93 Cadillac STS Black '93 Mercedes SL 500 Teal '86 Yamaha FZ750 - 15,000 RPM '86 Yamaha FJ1200 - Criminally Fast 2016 Ferrari 488 GTB, I drive it - don't own it. '05 GMC Yukon XL , SLT 4wd ( just purchased 2018) |
04-16-2018, 12:09 PM | #8 |
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Re: Need emissions help
This raises a question in my mind; is there a code in the option list that indicates the requirement for an AIR pump and related hardware?
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1989 K1500 Chev. EC Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit. 2009 Hummer H3T 3.7L 5M (sold) 1997 K2500 Chev. EC 7.4L/ 4L80E 2018 Dodge Ram 2500 HD R/C |
04-16-2018, 01:34 PM | #9 |
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Re: Need emissions help
The dealer should know by the VIN number? If the emissions decal on the fan shroud is missing...... that decal will show it clearly.
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'70 GTO Midnight Blue '88 GMC Sierra SLE 392,000 miles-(2018) sold to Classic car shop in Germany. '93 Cadillac STS Black '93 Mercedes SL 500 Teal '86 Yamaha FZ750 - 15,000 RPM '86 Yamaha FJ1200 - Criminally Fast 2016 Ferrari 488 GTB, I drive it - don't own it. '05 GMC Yukon XL , SLT 4wd ( just purchased 2018) |
04-16-2018, 02:39 PM | #10 |
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Re: Need emissions help
As a matter of fact I still have the original upper fan shroud off my truck. When my truck was still relatively new the 305 had a factory defect/ cracked engine block in the lifter valley. I checked the oil one day and there was chocolate jello under the oil filler cap. This was at 30K miles. So I take my truck to the dealer for warranty work and the dealer "mechanic" (I hesitate to use the term) said that they only authorized replacement of the short block and so they put the damaged heads on the new short block. This guy cross threaded some SAE bolts into metric threaded holes and other assorted nightmares along with breaking the upper fan shroud. I gave up with dealership mechanics at that point. I had problems with the work that was done and months later I went to the local Pontiac dealer and bought a 350 OTC and installed it into my truck at the curb outside my apt. at the time. Best thing I could do at the time. I know I got side-tracked here but ignore it if you will and refer to the pics I posted.
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1989 K1500 Chev. EC Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit. 2009 Hummer H3T 3.7L 5M (sold) 1997 K2500 Chev. EC 7.4L/ 4L80E 2018 Dodge Ram 2500 HD R/C |
04-16-2018, 02:50 PM | #11 |
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Re: Need emissions help
Mr Rich...
If your crappy engine repair was at a GM dealership, then you have a warranty ( if your original warranty / extended warranty is in effect).... If you return to any GM dealer due to their (GM) bad repairs, & they accept the truck - ( same complaint / second visit),..... Automatically, that repair is exempt from any time/ mileage limitations.
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'70 GTO Midnight Blue '88 GMC Sierra SLE 392,000 miles-(2018) sold to Classic car shop in Germany. '93 Cadillac STS Black '93 Mercedes SL 500 Teal '86 Yamaha FZ750 - 15,000 RPM '86 Yamaha FJ1200 - Criminally Fast 2016 Ferrari 488 GTB, I drive it - don't own it. '05 GMC Yukon XL , SLT 4wd ( just purchased 2018) |
06-20-2018, 11:53 AM | #12 | |||
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Re: Need emissions help
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It's also pretty obvious that he didn't care to answer back in April so chances are good he's done with this thread. |
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06-20-2018, 08:15 AM | #13 | |
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Re: Need emissions help
Quote:
I know this is a couple of months old, but that pic of your emissions label shows that your truck came from the factory without the air pump. It's not required to pass emissions. |
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06-20-2018, 09:50 PM | #14 |
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Re: Need emissions help
We probably lost the OP with all of our back-and-forth comments. And I still don't trust dealerships unless I work there and I'm not hired at any and so it goes. My old truck has almost 289K miles with just me as the mechanic for the last twenty-five or so years. I've replaced/ repaired everything in the drivetrain during that time. It doesn't look pretty but I still like that old truck; gray primer and all. The interior is in clean and very good condition. Amazing what a upholstery cleaning machine can do to freshen things up.
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1989 K1500 Chev. EC Original owner; some of the aftermarket parts I've installed are Borla headers, Hypertech chip, Edelbrock water pump, and a Stillen rear disc brake conversion kit. 2009 Hummer H3T 3.7L 5M (sold) 1997 K2500 Chev. EC 7.4L/ 4L80E 2018 Dodge Ram 2500 HD R/C |
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