when going up hills my vehicle looses power and overheats just below the line
What is your question?
the car runs fine other wise but when i drive hoe from work its starts to lugg out going up a incline for about 1/4 -1/2 ill drop from 60 to 30 mph by the end and the engine temp gets just below the over heat line and then as soon as im past the hill its fine . i just changed the spark plugs and replaced the coil packs and wiring harness since they were toasted when a coil melted . i checked to see if i had pcv vacuum and took the oil cap off put a rubber glove and fastened it with a rubber band and when the car was idling the give was being sucked in . also my vacuum gave me a pressure of 17psi on intake vacuum line off the air intake . i cleaned the map sensor an i have no codes throwing up and my engine light dosnt come on . so i,m thinking ,my cat is clogged . will check the o2sensors reading in the morning and see how they are .
RepairPal Certified shops can diagnose and repair your 1996 Volvo 960. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Hello,
Use a combustion gas test kit for the engine coolant if you are losing ANY coolant.
It is possible that you have a very slow leak on a head gasket, and the additional load required to climb the hill is causing a coolant leak and overheating.
If the catalytic converter is clogged, the engine vacuum at idle would remain fine, but holding it at 2000-2500 RPM you would notice intake vacuum dropping slowly.
Also, fuel. When the engine runs lean, it runs hot. There may be a fuel delivery issue, so check at the engine for fuel pressure and see if fuel pressure bleeds off quickly once the fuel pump is turned off.
