87_gta

hey guys i have solved all my running problems with 1 now new exeption code 42! how can i fix this 1. i just also noticed today that my headers are also glowed red when i had the car running wtf? anyone know please and thanks

87_gta

91 camaro racer

iTrader: (2)

not sure about the code 42 (Electronic Spark Timing (EST)) are all your wires connected? and i think that misfiring causes headers to glow red. sorry i couldn't be more of a help

87_gta

all my wires are connected i have gona over everything, and all connections are good, doesnt sound like its missfireing. could this be ignition control module? when i went to start the car i had to keep on the gas for a bit but i only been doing this since code 42 showed up

monoply6

hi 87_gta if you have cats check them if they break and block your exuast your headers will glow red also does it rev freely above 2-3000 rpm engine will usely strugle to rev if cat is broke hope it helps

HP junkie

I had the same problem on a regal. The cat convertes were cloged. I cut them out problem solved.

87_gta

it will idle pretty well over 1500 to 3000 but thats when the headers start to glow, i have a dual exhaust on the car with 2 cats could both get clogged like that?!? it even gives my trouble starting still, could all this be related to code 42?

RED86Z28

You need to check your timing and fuel.

RED86Z28

with code 42 showing you are most likely not getting any advance above the base.

87_gta

i have fuel, i have checked that a few times now. i havent touched the timing at all. this code showed up after i had all the spark plugs out and and was turning the motor over to clean out my cylinders

87_gta

did a little observation of the car while idling and the headers dont turn red while its idleing. I had the car running for 5 min no red glow, all the other times i was on the gas. i was told by some people i know that headers glowing is a sign of running lean. also when im in drive and i give it gas it doesnt want to go, like it has no ***** what so ever. none of this happened before code 42 showed up. my repair manual says for code 42: poor electrical connction, open or short in circuit; defective ignition module; defective ecm. i have gone over all the electrical connections and their alll tight. im not totally sure how to check for an open or short in circuit. i do want to check my ignition module but according to the repair manual i have to take my distributor out ??wtf? and i kno my ecm is working properly cuz i unplug other sensors and it picks it up. i do want to check my igniton module but do i really have to take the distributor out of the car or can i just take the cap off to get at it?

ibmtech

iTrader: (1)

Is your E.S.T. where mine used to be located. I used to have a 165 ECM with MAF and my EST was located directly behind the power booster on the wirewall. It is a box about 3 inches by 3 inches in Diameter. If you are running a 730 S/D ecm which is evident by a Map Sensor, your E.S.T. would be in your Distrib Cap and controlled through your ECM.

D's89IROCZ

I thought for the 165 ( well my 89 ) that teh EST is IN the dizzy . It's the plug you pull out when timeign the car ?( brown tan wire)

87_gta

Well i have 110% found my problem my ECM is done. swapped the 1 from my iroc into my GTA and everything is now perfect accelerates good no glowing headers starts right away. now i just have to find a new ECM

TPI-Formula350-

Hey guys I am having code 42 problems myself. Poor power, I have spark to all 8 but not ruuning on all 8? I'm going to get my ingnition control module check out now at an auto part store. any advice?

87_gta

mae sure they test it a few times until its nice and hot that way you know its being tested under running conditions. i have heard of some people that have tested them and on the 3rd try it tested bad, never know i guess. for me it was my ecm. if not the control module also test the pick-up coil and make sure its not shorting to ground. if it is i would replace that, about 20 bucks at parts store.