I think my issue is centered on the AFM in my 93 LC.
Originally, I purchased it in non running condition and in troubleshooting I found that the two screws in the AFM had been removed. I soldered the connectors in the AFM and the truck started and ran. It passed smog here in CA and ran until a few days ago. The LC starts for about 15 seonds and stops if gas pedal is not applied. I checked the engine codes and showed 24 and 32 which are AFM related. Thinking that my soldering had gone bad, I purchased an off brand AFM from ebay. With the generic AFM, the LC runs for about 30 seconds, acts like it's choking, then stops. It also shows the same engine codes. I am looking for a used AFM or a place where to have it refurbished.
Could it be that two AFMs are bad and needs a known good one?
In troubleshooting, I have:
Checked the hoses to and from the AFM to the throttle body. I know air could be getting in somewhere.
I jumped FP- and B+ to bypass the fuel pump logic
I have checked the Circuit opening relay resistance again the FSM
Reset ECU by removing negative terminal from battery.
Thanks in advance for any suggestions!
Originally, I purchased it in non running condition and in troubleshooting I found that the two screws in the AFM had been removed. I soldered the connectors in the AFM and the truck started and ran. It passed smog here in CA and ran until a few days ago. The LC starts for about 15 seonds and stops if gas pedal is not applied. I checked the engine codes and showed 24 and 32 which are AFM related. Thinking that my soldering had gone bad, I purchased an off brand AFM from ebay. With the generic AFM, the LC runs for about 30 seconds, acts like it's choking, then stops. It also shows the same engine codes. I am looking for a used AFM or a place where to have it refurbished.
Could it be that two AFMs are bad and needs a known good one?
In troubleshooting, I have:
Checked the hoses to and from the AFM to the throttle body. I know air could be getting in somewhere.
I jumped FP- and B+ to bypass the fuel pump logic
I have checked the Circuit opening relay resistance again the FSM
Reset ECU by removing negative terminal from battery.
Thanks in advance for any suggestions!