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1987 chevy truck with no smog pump from fac.anyone else???
1987 chevy pickup 66 thou. orig. miles. with 305 tbi,not hei,centre bolt covers,coil seperate from dist.NO SMOG PUMP,no tubes to the manifolds ...is this rare??.ive never seen one without smog pump.for this year..ANYONE?
4 Answers
- trible_iceLv 41 decade agoFavorite Answer
1987 should be a fuel injected engine with a throttle body if it is there should be no smog pump. 1986 was the last year chevy had a carburetor. fuel injection uses an oxygen sensor to keep all the harm full things like hydrocarbons out of the air.
- Jason SLv 51 decade ago
We had a 1987 GMC with a 350 TBI, center bolt valve covers, etc. It didn't have a smog pump or injection tubes.
Source(s): Had one - ?Lv 61 decade ago
its not really that rare, my 87 GMC 1500 (305) didnt have either. It most likely depends on where the truck was originally sold. Most non CA trucks came without. I have seen 85s and 86s with smog pumps and the a.i.r tubes..
Source(s): www.67-72chevytrucks.com (largest 73-87 message board on the net) www.73-87.com - gravel128Lv 51 decade ago
I dont think chevy put a smog pump on till '91 or 2.....my 90 suburban dosent have a smog pump....they didnt really come into play with the TBI trucks....you would see them more on the EFI...
what is strange is that it dosent have HEI on it...did someone change it over to a coil?
Source(s): 15yr mechanic/ owner of 3 chevy trucks