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ZUKIWORLD Discussion Forum => Technical Discussion - Performance / Modify => Topic started by: robbyrob on April 22, 2012, 08:15:40 AM

Title: HELP!! how can i trick my check engine light to work with a weber carb?
Post by: robbyrob on April 22, 2012, 08:15:40 AM

i just got done putting a weber 32/36 carb on my 87 samurai i want to know if there is a way to get the check engine light to work as far as when the key in in the on position the light is on and when it is running the light is off? i would like not to have to pull the ECM so i can still get threw smog. the only idea ive come up with is to run a diode in the alternator line and then run a solenoid off of that but i cant seem to find a solenoid that is big enough to use. Any ideas please help

Title: Re: HELP!! how can i trick my check engine light to work with a weber carb?
Post by: rascott on April 22, 2012, 10:54:52 AM

the computer is looking for signals from the carb. re: throttle positions, mix. control solenoid function,  vent solenoid, fuel cutoff.
the throttle switches can be jumpered(as if they are on), but it will still need to see the others.
also- it is difficult to tune the weber to meet the emissions without the help of a carb. savvy smog guy.

i pulled the solenoids out of my stocker, stuck 'em in a little box, wired them up like stock, and mounted it kinda near the battery. that gave the ecm the right signals to keep the light functional(still looking at temp and o2 sensor, rpm, etc.).
light goes on w/ign. and out after start. like normal.
it will still function if other parameters get out of whack, like exhaust too rich, .........

i did pass smog, but had trouble with the idle emissions. took some tweaking.