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1985

Hello, thanks for writing in about your Jeep Cherokee. The coolant temperature sensor for the gauge on your Cherokee should be on the back of the driver's side cylinder head. If you need some assistance with this, consider YourMechanic, as...

You need to check for battery voltage on the red wire to the coil with the key in the on position and then check the same wire when you go to the crank position. If either one is not as...

Hello there, many common faults will cause your 1985 Ford F-250 to crank but not start. You have done great so far in inspecting the vehicle and changing the spark plug wires, fuel pumps, and filters. There are a few...

One thing that may have happened if the engine was flooded is that the cylinder walls may have been washed down by excess fuel. Once this happens the engine has a distinctly different sound when starting. Also, even spraying starting...

You may have a clogged radiator cap so coolant can go into overflow tank and back into radiator. Check cooling fan clutch to see if it is locking up as it should.

Your vehicle probably has a cold start injector time switch, or comparable means to enrich the mixture on cold start to prevent immediate stalling. That component is subject to failure and I would check that first. To generally rule fuel...

Hi Wayne. Thanks for contacting us today. Back in 85, GM V6 motors only had one O2 sensor. It was considered an upstream sensor, which means that it was installed near the center of the exhaust manifold. Downstream sensors were...

Hi Jennifer. Thanks for contacting us today. Unfortunately, replacing a head gasket is not a service that our mobile mechanics can offer - as it requires more equipment and time to complete than our mobile services can provide. Your best...

Hello, thank you for writing in. The vehicle may be experiencing a wide variety of issues. Considering the age of the vehicle, the list can get even more extensive. Unfortunately, this is going to be a process of elimination until...

Claimed by Tim Charlet

The oil pressure light will usually come on when a few things could be happening. Either the motor is in fact low on oil, the oil pump could be failing or the oil pressure sending unit (https://www.yourmechanic.com/services/oil-pressure-sensor-replacement) is not working...

Hello there, many faults will cause your 1985 RX-7 to not have power at the fuel pump. The most common faults are the ignition switch, a shorted wire, improper ground, or a faulty fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement). The first step will...

Hi There, It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate and eventually stall. The idle air control valve (https://www.yourmechanic.com/services/idle-control-valve-replacement) is a small valve on the engine's intake system...

Hello. Since R12 and R134 have been mixed into the refrigerant system, there is a good chance that the mix of the two types of refrigerant could have caused damage. They use different kinds of oil, and can cause coagulation...

The "battery" light is actually the charging system warning light. It means that the charging voltage is low. Most often it indicates a problem with the alternator, but there can be other causes as well. If the alternator is not...

The spout connector is within about 6 inches from the electrical connection of the TFI module on the distributor. Pull out plug to set base timing.

Hi Jordan. When you have a rear main seal leak, it's very difficult to repair without removing the engine. Low oil pressure is typically caused by low oil levels, but also a failing oil pump. However, it usually does not...

It is possible that you could have a problem with your ignition switch. If the ignition switch has an electrical issue, this can cut out the ignition to the entire engine and cause it to die. This would also explain...

Definitely check that the stereo was installed properly. If you can't find a wiring diagram online, try a local stereo installer. They might be able to help you out. GM products, particularly in the 80's, were prone to gauge issues....

Although the engine computer used in 1985 engines is rudimentary, the fact that it exists means that you will have to completely change out the vehicle's wiring harness. Those harnesses are no longer available, of course, which means that you...