1999 Toyota RAV4 "surging engine rpm 1997" Questions

...engine began surging , when slowing down engine continues to surge then , at idle will continue to surge form idle rpm to around 1200 rpm Sounds like a possible vaccume hose leak? adjust or replace ...

accelerating or decellerating) the engine shudders and shakes. Surging is often caused by a bad sensor in the air/fuel supply - MAP, IAC or TPS. Check for trouble codes (DTCs) using a good code reader

...RPM then drops back down, a few seconds later it surges again and so on. It only does it after the car has been running for awhile and does not surge while driving. Ive checked for loose electrical ...

climing hills what would cause this. Tia Engine is surging or the transmission slipping? My guess is the transmission is slipping, letting the engine rev up to 3000. Does it feel like it quits pulling

...engine surge. The surge rpm is equal to fast idle. The repeating cycle is 10 seconds normal idle, and 2 seconds surge to fast idle then back to normal idle. To confirm this cycle I watched for 10 ...

...runs fine till 3,000 rpm. changed plugs, wires and cap in good shape. fuel pressure good at fuel rail, any ideas, I'm stumped run engine codes, had same issue once before it was bad computer good ...

rpm? If it's the latter, chances are your engine's balance shaft is not timed correctly. This causes a heavy high-frequency vibration/buzz throughout the car, at the aforementioned rpm ranges. If it's

...RPM? surge. 1000 to 2000. what? numbers tell the tale. first off, idle is the last thing to work right on any engine. there are many ways to find what is wrong. fix idle surge way. i make sure that ...

...rpm ,found some vac leaks and changed cap and rotor,i am stumped I would check for intake gasket leaks, usually in the back where it is hard to see. You can use a mirror. Alot of the time there will ...

...surging or loping wont run right, missing i have a very bad mixture of fuel and air, smells real bad. Tried to fix the problem. Replaced MAF sensor, idle control, throttle position sensor, new plugs ...