what is the most probable cause of an engine running sluggish?

Answer 1

I find that the first thing general maintenance wise is the fuel injector spray pattern gets less atomized due to being dirty, so a bottle of lucas or techron injector cleaner (and upper cylinder lubricant) would start helping out.

If the car has more than 50,000 miles on the last set of spark plugs and the ones in there arent platinum, or the car has high miles and smokes, then new plugs may be in order.

If the car has a distributor (most new cars don't) then cleaning the cap and rotor on it with a scotchbrite pad will help.

If the car is 10 years old or more and with 150,000 miles or more, you may have a plugged catalytic convertor. There are chemical cleaners you can try, but if that doesnt seem to do the trick, then don't buy an OEM "cat" convertor pipe, they are rediculous money. Ask for a magnaflow stainless cat (about $100) to be welded in with a new "aft exhaust manifold pipe", often called a Y pipe. They run between $250 for aluminumized steel and $350 for stainless steel complete with the cat installed on your car.

Good luck.

Answer 2

What do you mean by sluggish. Year, make, fuel system would help. Its very generic.
1.Change air cleaner.
2.Check plug condition,
3.ignition timing,
4. plug wire condition,
5.compression,
6. valve lash,
7. exhaust system for bent,crushed plugged pipes,
8. make sure tire pressure is up,
9. parking brakes are not dragging,
10.engine oillevel is rite and right grade(10W-
30)and there is oil pressure,
11.clutch is not dragging. That should be enough for a couple of minutes.
12. Fuel filter is clean
13, thermostat is operating correctly.

If that don't fix it, somebody peed in your tank.

Answer 3

do no longer "rap" a sparkling engine in the previous breaking it in. New engines are very tight. enable it idle till it smooths out. ensure each and each and every of the vacuum lines are in position and under no circumstances leaking. countless different issues might want to reason this. that is sturdy to envision with an OBD II code reader. in case you used each and each and every of the former manifolds, new gaskets and nicely proper torque series develop right into a ought to in assembly.

Answer 4

i own a repair shop,and the most problem i see the most is old spark plugs in them,they get worn and weak ,and just wont fire good at all,the second most thing i see is dirty air filters and bad gas filters,these are some of the things i guess that people think will last forever,but they wont,those are the most common ones ,good luck,i hope this help,s.

Answer 5

I'm not exactly sure but tune up your engine and hopefully that will increase the power. I know if you haven't tuned up in a few years do it that would be a good start or go to a mechanic.

Answer 6

Needs a tune-up. Plugs, plug wires, air filter fuel filter, etc. Or a stopped up catalytic converter.

Answer 7

Usually not enough gas getting the cylinders or poor ignition.

Check your in-line gas filter if you have one.

Check for a good spark and for properly gapped, clean, non-fouled plugs.

Answer 8

1 - ignition timing including
2 - worn out spark plugs
3 - fuel problems: clogged filter, mis-adjusted carb, or clogged fuel injectors.
4 - mechanical wear: worn rings, valves and/or lifters
or any combination thereof.

Answer 9

That's not enough info to figure it out. Add some details, some symptoms, when and how.

Answer 10

oilchange, exhaust cap/rotor plugs wires, injector/carb cleaner lots of stuff could cause it. airfilter