Q: 4Runner has no power in the engine.

asked by on

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
  1. Home
  2. Questions
  3. 4Runner has no power in the engine.

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

Q: Opinion on '90 to '95 Nissan Pathfinder

Not the new ones, but the old ones were good, yes. Nissan Pathfinders were decent vehicles, but you don't want to get one that is all worn out. Those have a lot of problems with automatic transmissions. If you can...

Q: Is my mechanic responsible for engine damage?

Hi there. I have a few questions for us to ponder as we probe this concern. Did the vehicle overheat since the repair? Is the vehicle currently overheating? Is the check engine light on? If so, what are the stored...

Q: Q: High idle problem.

This may be a sign of a vacuum leak. A vacuum leak can be one of the most frustrating and difficult problems to diagnose. High idle speed is a common sign and stalling is another. Confirmation of an engine vacuum...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...