smog pump, makes me backfire!

Axel Kain

New Member
Jan 30, 2006
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Midlothian Va.
1-I have been progressively fixing this car, (86 2.3 N/A) and i had cut the smog pump belt so it would quit backfiring. had to put a new belt on it for state isnp. and found that if I just disconnect the vacuum hose from the little control thing behind the pump, it will stop backfiring.

the kicker is that it only would happen when i first start the car, morning, afternoon, cold start, just stopped to get gas, then restart! it would do it every time I start the car.

2-also- I have constantly high oil pressure, once ive been driving for a while it may come down a bit, but usually stays near the letter "L", (normal).

3-lastly, I recently changed my oil, and tossed in a can of Resoline compression restore, my oil level is near the max line, or just above, not by much though. but when i get on it usually in first, and some of seccond, it will blow some white, very lightly blueish smoke, i know that usually white is coolant, but i believe it to be carbon, as it smells -not burnig coolant- like. the slight blue is probably from the slight excess of oil i have. it is strange, once after i had run it to about 4750, or 5000 rpm between shifts, then i stopped the car in neutral, and patted the gas, fluctuating between 2500, and 4000 rpm, it billowed out white smoke! the coolant temp stayed the same, the oil press. stayed the same, I DONT GET IT!!!

:shrug: :bang:

sorry for length, but would rather keep it all in one post. thanks!
 
does your diverter valve(thing behind the smog pump) have 2 vacuum hoses on it??

verify vacuum hoses are routed correctly

run a KOEO and KOER test - you'll probably have a code 45 or 46.

sounds like you're getting AIR upstream after startups. should only be when engine is cold.

your smoke is probably oil.

did you do a compression test before the oil additive??
 
well its mostly white smoke, but i expecting that to be just crap burning off, and a bit of oil mixed in... i do need to figure out how to run codes...haynes is a bit sketchy in its directions.

i wouldnt be surprised at anything wrong w/ this car, previous mechanic was a half ass. theres a few things ive run into that i couldnt believe he let pass inspection!

i do plan to do a comp. test, but havent yet.