littlejep

ok guys i need some seriously help. I have to get this sloved in three days so i can pass emissions and get my car re-licensed. here the story.

2 years ago i failed emissions fairly bad. this is when my grandfather owned the car. He has the acv replaced and it pass the emissions with colors. BTW the car is a 88se.

last week i failed emissions just as bad as before the car had the acv replaced. ANd failed with almost exact same numbers as the first time. SO i know have three days to get this fixed, but i dont have the 750 bucks to get it fixed like my grandpa. but soemthing makes me think that there is something else that is not letting the acv work correctly or to its potenial. Is there something that could not make it work right???? ok so if anyone coulde help me please that would be great. maybe some thorough explanations on what could be wrong or what i could to do fix this. I am 16 and love this car and have been working on it for 2 years now, i know quite a bit about it but i need good explanations. thank you guys alot.

HAILERS

What year. Matters. Turbo or N/A. Matters.

easy p-cheesy

HAILERS

On the r/h side of the engine is the air control valve. At the top of the acv, there area two vacuum hose. With the car warmed up, and at idle, pull them off one at a time and feel for a suction AT THE VAC HOSE. You should have a vacuum being pulled at each hose. Write back your results. One step at a time (sounds like that drug rehab around the corner, *one step at a time*).

littlejep

thanks hailers ill go do it right now and come back with results

littlejep

ok hailers? are these hoses close to the oil filter?? am i in the right area? i have the haynes manual but i cant tell to well. how large are these hoses?

Scott 89t2

pas side. on the air control vavle.

there is a pic top right of page 169

there are 2 normal size vac lines on the top of it

littlejep

ok im an idiot, i found them. the upper hose, closest to the air pump when removed from the air pump had no vacum .The lower hose when removed from the acv had nothing going on, not sucking and not pumping any air out. although where the lower hose connects to the acv there was air pumping out of the acv. so whats next? thanks alot

HAILERS

I trust this is not a Turbo?????? Actually the two small size vac hose on the non turbo are at the top of the acv, but not actually attached to tlhe acv. They are close together, their metal nipples sticking straight up and the vac hose going towards the rear of the engine. Those are the two your interested in foremost. With the engine running, pull one off at a time and feel for a vacuum at THE HOSE. If you do not feel a vacuum at the rear of these two hose, I'd first suspect that your tps is not set right or on the drivers side of the engine, the BLUE connector is off the RELIEF SOLENOID. Anyway check for the vacuum on those two lines and let us know. Also assure me this is or is not a turbo, please. I'm late for work right now. Later.

HAILERS

I really need to know if this is a turbo or a n/a engine. The acv works similar on both types, but there are differences. I'll assume right now that its a n/a. You say you took the bottom hose off. I assume you meant the large approx one inch hose, and a large volume of air came out, at idle. Now thats an indication the acv is not working right, but does not mean the acv itself is bad. What controls whether or not the acv dumps air overboard, is one of the small vacuum hose located near the top of the acv. They are appox 1/4 inch in size. The rear one of these two hose, pulls a vacuum on a diaphram in the acv, which in turn closes a poppet valve inside the acv and shuts off that flow of air to the bottom hole where air is now flowing out. The idea here is to check and see if that rear, small vacuum hose has suction on the hose when you are at idle. If there is no vacuum at that hose, then most likely the Relief solenoid is not being energized. Its the solenoid on the drivers side of the engine that has a blue connector. Don't panic. What makes that solenoid energize is the proper setting of your tps. If the tps is set right (has an output to the ECU of approx 1v on its green/red wire), then a ground signal will be sent from the ECU to the Relief(blue)solenoid, which will in turn energize it. That act will pull a vacuum on the small vac hose above the acv, which will pull the diaphram which will pull the poppet inside the acv to close off the air from dumping overboard.

littlejep

ok, well im at school right now so when i get home i will test those other two hoses that you said we were most interested in, thanks alot hailers. and you were correct this is an 88se n/a

littlejep

i did the test with the digital meter and got 1.49 volts for the blue and yellow wire, and 14 volts for the black and white wire. what now????

HAILERS

Good to hear that you got 1.49 volts indicating the solenoid is working with the ECU. I attached a jpg out ot the 87 manual. See if this works better for you than my rambling. Actually two jpg should follow.

HAILERS

Second jpg:

HAILERS

I'm really puzzled now. In a pm you said that at idle, air was blowing out of the large port on the bottom of the acv when you took the large black hose off. Was that right? If that is still the case, after you checked and got the 1.49volts at the blue/yellow wire, then we need to put a spare piece of vacuum hose on one of the two small vac hose located near the top of the acv. You'd put it on the rear of the two nipples and suck on the spare hose while the engine is running at idle. The air should cease to exit at the bottom of the acv when that is done. If you suck on the spare vacuum hose and cannot pull a vacuum, then the acv relief diaphram is toast. NG.

littlejep

ok i did the spare vacum hose thing and i was able to get the air to cease to exit at the bottom of the acv. so my acv ain't bad??? waaahooo, what else could be cuaseing horrible emission results? or what can i do for a temp fix to pass??