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Problem developed suddenly, without warning after running engine from Philadelphia to Washington DC at 70mph with A/C on Auto, and suddenly slowing down just a few days ago.
Additional warning lights "engine overheated", "stop engine". Car slows way down runs sluggishly. No white smoke in exhaust and no yellow gunk in oil. No leaks except for overflow due to hot engine.
New Radiator installed in March, 2009 with new hoses, new dex cool coolant. Oil and oil filter changed and new thermostat installed, yesterday! All coolant and fluid levels full. Pressure test shows no leaks. Fans working, fan belt ok, cooling fan fuses work, cooling temperature sensor works, water and fuel pumps ok. Mechanic did not drain or flush radiator or clean the radiator coils because he saw no dirt. Mechanic does not inspire confidence otherwise I maintain car meticulously.
Compression test shows 65psi instead of 150psi. Car overheats within 10 minutes with or without A/C on. Mechanic now suspects cracked cylinder head or blown head gasket, despite absence of exhaust smoke and/or oil gunk, perhaps hairline crack. I don't want to replace engine what do I do? Is Thermagasket sealer or other sealer recommended or not?
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If you haven't had the timing belt done, there is a good chance that the timing belt broke. It is due to be replaced every 90,000 miles along with the water pump. You have an interference engine which means that if the timing belt fails, the valves will hit pistons likely cause damage to the engine. Best case, you get away with having the timing belt replaced. Worst case, you will need an engine.
No idea to be honest without a play with the engine but i would check out the O2 sensors first as this would cause it to run rich ,these motors are pretty good on fuel especially the diesel manuals that i see although the petrol ones are not too bad as the ones i see have what look like a toyota engine in them and are always manual gearbox ,Use a automotive meter to check out the sensors although if this is a american market vehicle you should be able to read the OBDII
It is not the necessarily the sensor but the relay that controls it. Check the relays it could have been shaken free in the bump. Pushing the relay in and out of its socket could refresh the contact and solve the warning code. To clear the code disconnect the negative battery terminal for a few minutes.
It sounds like you may have a cloged fule filter, start with that and then check to see if your fuel pump had gone bad. Most likely it's your fuel filter if it's never been changed. The other common problems is a partial clog to the injectors but i don't think that is the problem here. Good luck
Pull out the spark plugs one at a time and check to see if they are firing. I had the same problem while merrily driving at 70mph. All of a sudden I lost spark in one spark plug wire. It just went without warning.
Check to see if your truck was recalled for a faulty cam shaft sensor. Some sensors develop hair line cracks which allow contaminants to get in and the sensor becomes intermittent. The symptoms can include sudden shutdown of the engine so a recall was issued.
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