Weird Problem! Heating/boosting

[Malero5]

I have a 1990 plymouth laser with 100k miles on it. It was sitting around for about a year so I changed a few things on it. I changed thermostat,radiator,spark plugs and all the fluids.

Well I have a problem. When I start the car it does fine, but it randomly jumps all the way to the hot side of the heating range. Ill immediately stop and feel the hose and it will feel cold. Ill do the same hting and the water gets slightly warmer as i drive around the block. Eventually I feel the hose and it feels about operating tempature. It is obvious to me that the thermostat is opening.

When I go to boost I get nothing but engine power. It doesnt boost at all... like the first time you try it will boost to about 3-4 pounds then at 4k rpms it just looses all boost.

I am guessing it is either not getting enough fuel and/or the ecu is going hay wire. I wont be able to get a data logger on the car for a couple of days and i need to sell the car asap (already have a buyer). I would appreciate any and all input.

 

[GVR4592]

I would replace the thermostat and make sure the wastegate flapper arm is attached to the actuator. I would also do a boost leak test just in case.

 

[playitlouddsm]

for your heating problem have you checked your coolant temp sensors on the water neck? After sitting for that long they could have gone bad or the wires them self. For a car sitting that long a boost leak test would be on the top of my list of things to do. Is the fuel in the car new, or has it been in the tank for a year too?

 

[Malero5]

I replaced the thrmostat too...... ill check the flapper. Yes the gas has been in a year, but i ran fuel injector cleaner through it a few days ago. There are two temp sensors i believe on the neck...which one should i replace?

 

[playitlouddsm]

Test the sensors first, by using the procedure in the chiltons. If they test bad replace them.

 

[KGB Pilot125]

there are 3 different sensors. here is a picture. I had to re-do the wiring on B-25 to get my gauge working again