92 bmw failed smog?

Question

hc ppm max 102 car 234 co% max .68 car1.69 the interval did not change at the 15 mph and 25 mph so this is my problem i know you say not to change things but the fuel pressure seems out of control there could be others but ill start there first

Answer 1

I doubt the fuel pressure is changing but you can make a cheapo test gauge from a household water pressure gauge for 6 bucks at Ace hardware, and get a fitting to put a fuel injection line on and T it off at the regulator,, I think more you need to clean the throttle body with cleaner, ( take hose off from AFM) spray it clean,,,

check your plugs and also what i have done is take some 12 gauge wire and a hose clamp and clamp it to the O2 sensor and ground it as these older cars have a one wire O2 sensor and if the ground gets rusty you have problems,

Answer 2

there's a trick to make it bypass. you're able to desire to characteristic some white gasoline to the tank, like metohydrate is the ideal, it somewhat is going to burn plenty warmer and deplete each and all of the gases in the previous they attain the tail pipe. I heard of somebody who did this on an previous Datsun that would not bypass and have been given it to bypass yet do it with merely a small volume of gasoline interior the tank and then after the attempt you could suitable up the tank with gasoline to dilute the white gasoline by using fact it is not that solid on your engine to maintain working it on that. desire this helps.

Answer 3

A '92 would be obd1 which has few sensors to help diagnose but if you could find a scan tool for obd1 it might help. This could be a cat. converter problem also.

Answer 4

how were the cats? to get my car to pass i drive around in a low gear to get the cats hot and them i get it right into the garage. long waits can cool down the cats enough to get them out of their optimum efficency levels.

Answer 5

Does it have the check engine light on
?