stalkerzonedog
New member
In a nutshell: I'm looking for info on disabling / removing / compensating for the oxygen feedback pulsing solenoid on a 1980 tq.
But first want to say a huge thank you to the posters on this forum and the "carter thermoquad spreadbore stuff" thread. I'm on my fourth Scout and my third tq, so I have had some time to learn a bit here and there. After the past week of reading up on this thread and others I am now amazed at how little I knew, so thank you thank you thank you.
For financial reasons, I am installing a non-IH application tq on my 345. Carb type 9372 to be exact, from the 80's, chrysler. Yes, I have been reading about all the extra undesirables that were engineered into these late tq's, and have scoured the thermo-quad guide by vaanth. However, in the guide, it is specifically addressed how each unnecessary component can be disabled etc.
Vaanth says:
"most 1980 and later tqs will contain an oxygen feedback controlled, pulsed solenoid in place of an ie module. The solenoid is variably pulsed by the control computer based on the signal it receives from the exhaust mounted sensor. The solenoid alters the variable air bleeds by inputing more or less air based on computer signal duty cycle. If the solenoid is disconnected, the air bleeds will allow a full Rich condition. Tuning with this in mind, this tq could potentially be used in a non-control/feedback vehicle."
okay, so even after reading about the idle enrichment system which the o2 feedback solenoid replaced, I don't quite know how to disable and remove the function and tune it to run nicely.
Would making a plate to cover the solenoid mounting location be helpful? The plate could have nipples to allow an ideal circuit. Should the solenoid remain on the carb unplugged? If so, how would the carb, as vaanth says, be tuned "with this in mind...to be used in a non-control/feedback vehicle"?
Any thoughts? Many thanks in advance!
But first want to say a huge thank you to the posters on this forum and the "carter thermoquad spreadbore stuff" thread. I'm on my fourth Scout and my third tq, so I have had some time to learn a bit here and there. After the past week of reading up on this thread and others I am now amazed at how little I knew, so thank you thank you thank you.
For financial reasons, I am installing a non-IH application tq on my 345. Carb type 9372 to be exact, from the 80's, chrysler. Yes, I have been reading about all the extra undesirables that were engineered into these late tq's, and have scoured the thermo-quad guide by vaanth. However, in the guide, it is specifically addressed how each unnecessary component can be disabled etc.
Vaanth says:
"most 1980 and later tqs will contain an oxygen feedback controlled, pulsed solenoid in place of an ie module. The solenoid is variably pulsed by the control computer based on the signal it receives from the exhaust mounted sensor. The solenoid alters the variable air bleeds by inputing more or less air based on computer signal duty cycle. If the solenoid is disconnected, the air bleeds will allow a full Rich condition. Tuning with this in mind, this tq could potentially be used in a non-control/feedback vehicle."
okay, so even after reading about the idle enrichment system which the o2 feedback solenoid replaced, I don't quite know how to disable and remove the function and tune it to run nicely.
Would making a plate to cover the solenoid mounting location be helpful? The plate could have nipples to allow an ideal circuit. Should the solenoid remain on the carb unplugged? If so, how would the carb, as vaanth says, be tuned "with this in mind...to be used in a non-control/feedback vehicle"?
Any thoughts? Many thanks in advance!
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