My radiator busted an then I lost my heating inside the truck?

JOSH_TOYOTA

MEMBER
1992 TOYOTA PICKUP
4 CYL
2WD
MANUAL
232,557 MILES

Hi my name is josh I first started havin problems out of my toyota when my radiator busted an then I lost my heating inside the truck an so I get a used motor I put it in and wired it up I had to swap all my sensors and every thing that the harness plugs into becuase the motor come out of a 88 toyota and the wire harness's are diffrent. Well it took me a while to figure out why I couldn't start the truck an I had a mechanic come look at it an he pored gas down this pvc hose that goes from the intake to the valve cover but I have to keep doing it to start it why is that?
and when I drive it, its like it hesitates to go but if it idles then its fine but it idles at like 2500 - 3000 rpm I just need some good advice on what I need to do

1 Reply

JACOBANDNICKOLAS

MECHANIC
108,170 POSTS

Hi,

Since the primary trouble seems to be twofold, my first suspect is that the engine coolant temperature sensor is either bad, not connected, or was damaged when the engine was replaced. The coolant temperature sensor monitors coolant temperature. The ECU uses this signal to control open/closed-loop operation of the fuel injection system, overdrive on electronic transaxles, spark advance (ESA), idle speed control system, and EGR system. So, that could be causing several different issues including no start cold, high idle, and drivability issues.

Here is what I recommend: First, check for diagnostic trouble codes that could be related. Because of the model year, this vehicle has an OBD1 system that doesn't require a scan tool to retrieve codes. Follow this link:

https://www.2carpros.com/articles/toyota-trouble-code-definitions-and-code-gathering-method-1990-1995

Next, inspect the coolant temperature sensor for issues related to faulty wiring, a bad connector, or anything that can cause a faulty signal. See pic 1 for location.

If there are no visible issues, I recommend testing the sensor. Pics 2 and 3 are the directions for testing.

I hope this helps. Let me know if you have other questions.

Take care,

Joe

See pics below.

Images (Click to make bigger)