so i jut got my 90' white hatchback 2.3l n/a lx, the guy that had it before me took off the muffler and turned the exhuast down right after the cat didnt sount great and didnt idle too great either. So today i put a CAI and a Dynomax muffler on it filled it up with premium 93 octane gas and put fuel system cleaner in it, after i was finished with all that i started it up and a huge cloud of white smoke came out for about ten seconds, since no more smoke has came out. but it does seem to idle worse its jumpy and idles from 800-1000 but its real rough. any suggestion on why it would idle like that? thanks
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1990 white hatchback 5spd CAI, FlowMaster exhaust, rear seat delete kit, ac delete, radio delete..... Soon to come weld draglites, and 4.10 gears
member of AAS (AUSTIN AREA STANGS)
founder of Blue Oval Mustangs
yeah the cai is in correctly but it was idling like that before i put the cai, but there is one vaccum line that is disconnected and i dont know where it goes.
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1990 white hatchback 5spd CAI, FlowMaster exhaust, rear seat delete kit, ac delete, radio delete..... Soon to come weld draglites, and 4.10 gears
member of AAS (AUSTIN AREA STANGS)
founder of Blue Oval Mustangs
im actually gunna change out the spark plugs and the wires in the morning thank you
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1990 white hatchback 5spd CAI, FlowMaster exhaust, rear seat delete kit, ac delete, radio delete..... Soon to come weld draglites, and 4.10 gears
member of AAS (AUSTIN AREA STANGS)
founder of Blue Oval Mustangs
All those sensors are in place for a reason and serve a purpose. And send signals back to the computer. The computer will then adjust the amount of fuel and air to the engine. If 1 sensor is bad or missing the sensor could be sending the wrong information to the computer. Thus calculating for a rough idle but programmed to think that its good. Any vacuum leak can create a rough idle and poor performance. Vacuum hose is cheap$, replace cracked or dry rotted tubing, even unseen pinholes can create problems.
all the vaccum hoses were replaced before i bought the car. but the guy forgot one, and on the diagram i have of the vaccum lines it just says that the vaccum hose goes into the fender.
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1990 white hatchback 5spd CAI, FlowMaster exhaust, rear seat delete kit, ac delete, radio delete..... Soon to come weld draglites, and 4.10 gears
member of AAS (AUSTIN AREA STANGS)
founder of Blue Oval Mustangs
If it goes into the fender it is probably supposed to go to the vacuum canister/accumulator. Look in the passenger side fender (wheelwell) to see if it is still there.
1990 white hatchback 5spd CAI, FlowMaster exhaust, rear seat delete kit, ac delete, radio delete..... Soon to come weld draglites, and 4.10 gears
member of AAS (AUSTIN AREA STANGS)
founder of Blue Oval Mustangs
1990 white hatchback 5spd CAI, FlowMaster exhaust, rear seat delete kit, ac delete, radio delete..... Soon to come weld draglites, and 4.10 gears
member of AAS (AUSTIN AREA STANGS)
founder of Blue Oval Mustangs
Need help with my new baby 
