So. The truck was working fine. Starts runs accelerates and idles fine when cold. When it gets warm up to running temperature it wants to stall out when I put it in any gear amd misfire through the intake at tines . I have code 23 and 37 coming up, I'm having a hard time finding the iat sensors location What else could be causing this . All the vacuum lines are on could one be clogged? It has an impco model e system but everything is working as intended this truck is factory propane from chrystler canada. I'm having a hard time trying to figure this out
I'm by no means a mechanic but have all the means to do it myself. I'm going to check out the impco vaporizer and the fuel lockout and check all the filters and replace gaskets and diaphragm in the vaporizer and then fuel lock filter and blow through all my lines tomorrow to make sure they are not clogged. I recently replaced all 8 spark plugs and radiator and thermostat , battery is fine and coil and distributor seem fine I checked in the dark for sparks on the wires but nothing was making a flash. It will idle and run fine when cold this problem only starts when heating up . I pulled out the coolant temp sensor and the other liquid temp sensor on the passenger's side by the intake manifold the exhaust manifold is where the coolant sensor is located. Is the iat sensor behind the throttle body ? Thanks in advance I am new to this forum and knowledge shared with me will be shared with others. Thanks current temperature at night is -5° and a high of 5° during the day. Never had any of these issues last winter in -30°

Anyone requesting more pictures or information feel free to ask thankyou all
1988 318 factory

 

23* Incoming air temperature sensor may be bad
37 part throttle lock/unlock solenoid driver circuit (87-89)

You need to look into the 23, This will effect the fuel mixture.

 

I cant find the iat sensor anywhere on the motor I had the vaporizer and throttle body and distributer out last night to check under them and around and no luck if anyone knows the location of the iat sensor on a 1988 5.2l 318 engine that would be great on the 93 and up it's in a different place so referring me to the wrong years wont help. Thanks in advance

 

Today I'm going to buy some new gaskets . And a new iat sensor in Hope's of having one one for my engine I'll find the location of the old one. Tia

 

This is what im looking for aparently but all the guides show something different ..

 

It's not on the motor it has to be on the lp carburetor or somewhere around it. Have no idea what the lp systems look like from the factory. It has to have a plug going to it so look around for that.

 

should be to the left of the map sensor

 

Going to take a peek for this keeping you all updated thanks for any replies seriously appreciate the tips as I get them
again code 23 and 37 .since I took the dist oudiand tried to clean it up a bit i put it back in and now I'm not getting spark at tdc so I'm going to replace it completly to rule out all possibility and install the new one at tdc with the rotor facing #1 plug wire. If this is incorrect to do please correct me but I'll be following a guide when the time comes

A 1988 dodge poweram w150 repair manual might be my best bet 318 5.2l


This is with the lpg impco carb and vaporizer off

Not liking the look of this since i took it out and put it back in it doesnt give spark lots of wear on it

Rotor cap looks corroded inside going to replace the distributor completly and go from there. Still on a manhunt for 2 pin iat sensor location.but it looks like in the amazon picture that its not a 2 pin connector. Yes ill set tdc vefore the dist goes back in point at the #1 plug wire

Whole engine compartment needs a good cleaning to come near future , there is a cap that goes over the fuel lock filter houseing there going to look more for the iat sensor that the engine is throwing code 23.

 

i think you can see part of the iat in the first pic you posted. looks like the tab on your rotor is tweaked which may be preventing spark. try checking for spark at the coil wire.

 

The coil is definatly working I checked it with my multimeter , the tab lootsp tweaked due to the angle of the photo . Is there a gap that that tab is suppose to be at maybe it's off regardless it all goes back togeather smoothly . The pins inside my rotor cap look like they are made of corroded porcelin and are losing there cut edge . If I cant figure out the no spark issue I'll replace the unit and go again from there . Maybe the impco systems dont have iat sensors and is left out because in the first picture the middle wiring harness the 2 pin that's plugged in in the back is the oil temp sensor and the other 2 2 pins not plugged in were never plugged into the motor before. Just some feedback thanks for your response crazywolf