TBI distributor question Code 42

[Burbdood 74]

Hey all, just a quick question.

Are TBI distributors prone to failure? The reason I ask is because I got a code 42, (fault in the EST circuit), and code 44, (O2 sensor lean), last night and I just replaced the EST module less than a year ago for the same reason. As far as the code 44, I have no idea what's up with that and I have no idea where to look since it has a new fuel pump, filter, rebuilt TBI and new injectors. I'm ready to start drinking again.

 

[GalDemSuga]

I'm sure your knock sensor is causing that code 42. It happen to me on both my 89 K5 TBI and 95 Yukon TBI. There wasnt any issue ith the EST. I say replace the knock and watch both codes go awa after a reset.

Hey all, just a quick question.

Are TBI distributors prone to failure? The reason I ask is because I got a code 42, (fault in the EST circuit), and code 44, (O2 sensor lean), last night and I just replaced the EST module less than a year ago for the same reason. As far as the code 44, I have no idea what's up with that and I have no idea where to look since it has a new fuel pump, filter, rebuilt TBI and new injectors. I'm ready to start drinking again.

 

[4X4HIGH]

Have you disconnected the EST bypass wire to set the timing on the engine recently? That code 42 will appear if you disconnect the EST wire in order to time the engine is why i'm asking about it.

 

[Burbdood 74]

Have you disconnected the EST bypass wire to set the timing on the engine recently? That code 42 will appear if you disconnect the EST wire in order to time the engine is why i'm asking about it.

Come to think about it, I did set my timing a week and a half ago. But I thought that the computer would have forgotten that by now.

 

[4X4HIGH]

Come to think about it, I did set my timing a week and a half ago. But I thought that the computer would have forgotten that by now.

IIRC the ECM will delete the code after 50 starts of the engine. Could be that you haven't started the engine 50 time since then. Easy enough to just pull the ECM A fuse.

 

[Burbdood 74]

Ok, tonight on my way to the parents' house for dinner, the SES light came on again and gave me a code 42 and code 44. I have been really suspect of the distributor so I'm going to buy a pick-up coil and an ignition module.

My question is: how hard is it to replace the pick-up coil? Any special tools I'm going to need to get it done? Would it be wiser to just get a replacement OEM distributor and be done with it? Any help is GREATLY appreciated!

 

[4X4HIGH]

Ok, tonight on my way to the parents' house for dinner, the SES light came on again and gave me a code 42 and code 44. I have been really suspect of the distributor so I'm going to buy a pick-up coil and an ignition module.

My question is: how hard is it to replace the pick-up coil? Any special tools I'm going to need to get it done? Would it be wiser to just get a replacement OEM distributor and be done with it? Any help is GREATLY appreciated!

In order to replace the pick up coil you have to remove the distributor and take it all the way apart. The only thing you'll need is a small punch to remove the rollpin that holds the gear on. Keep in mind that if you buy a stock distributor at your local parts store that the pick up coil and or module could be a tested good old part since they are "rebuilt" and NOT new.