Q: 4Runner has no power in the engine.

asked by on January 31, 2017

Hi I have a 1990 Toyota 4Runner with the 3.0L V6 and it has a miss (sometimes more than one) but I believe there is another problem as it also has a rough idle and a major lack of power as it takes a long time to accelerate (about 15 seconds to get to 35) because the engine will not rev over 2k even with it floored (when in drive, will rev higher if shifted manually). I have replaced the plugs wires and air filter but to no avail. There is plenty of fuel getting to the engine too. I suspect a vacuum or EGR problem. The check engine light does come on but I don't know how to pull the codes as it is an OBDI and I only have an OBDII reader. Please tell me what you think the problem is based on this short description. Thanks

My car has 276894 miles.

Check the engine for a vacuum leak and see if the valve on the brake booster is leaking. Also check the EGR (Exhaust Gas Recirculation) is stuck on all the time. A vacuum leak or the EGR being stuck on all the time will cause the engine to operate with a loss of power and may overheat. If you need further assistance with your engine having a loss of power, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Car starting, idling, and then stalling

Hello. If the engine will only run for a short period of time then it may have a failing fuel pump or an electrical issue. Being that you stripped out the fuel filter connections, the metal lines may need to...

Weird helicopter noise while braking - 2012 Toyota Corolla

Hello. Based on the symptoms you are experiencing, I would first recommend having your vehicle inspected by a qualified mechanic to determine if your brakes and suspension components are performing properly. If your steering wheel is shaking when you...

Soft clutch, topped off clutch fluid reservoir and clutch pedal became firm/springing back on its own.

It is most common for the clutch hydraulic leak to be from a leaking clutch slave cylinder. You should have the clutch hydraulic system inspected by YourMechanic to see why the fluid is getting low. The fluid gets low anytime...

Related articles

Symptoms of a Bad or Failing Oil Return Hose
Common signs include cracks or bulges on the hose and noticeable oil leaks.
How Serious Is It When a Hose Is Leaking?
A leaking hose in your car could indicate different problems. Some leaking hoses are more serious than others, but all should be checked and repaired.
What Causes an Exhaust Manifold to Crack or Leak?
Your car has two manifolds – an intake manifold and an exhaust manifold. Both serve essential purposes, but the one most likely to...