Question about 2001 Toyota Sienna

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My Sienna starts and revs the RPM's up to 2000 then idles at about 1200. It will constantly surge while driving at speeds under 55. Could this be the fuel pressure regulator?

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  • brandt496 Sep 30, 2009

    A week or so ago it would idle very low when started and would occasionally stall when put into gear. Now it is the opposite. It runs at very high rpm's even when sitting still. You have to hold the brake firm because if stopped in traffic you are running at 1200-1300.

  • Samuel Charles Spriggs May 11, 2010

    I would expect a bad fuel pressure regulator to cause a rough running engine instead of surges.-------- Charlie

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Yes could be... also the engine should only idle at about 600 when warmed up and 1200 on cold start up so get it checked out a any good garage...

Posted on Oct 01, 2009

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2000 Suzuki Esteem 1.8L.. I went to start my motor & turned it off right before started. I heard some kind of backfire. Then I started it and it's been idling high, the surging. Please help!!


scan it yet, a FULL OBD2 scan? why not?if not.
now is the time...


the 1.8L J18 engine, same as the older Sidekick sports used.
same engine , know it I do.
its the precursor to the J20, (j18 is under-stroked, j20 with many of the same parts. inside)
the back fire means explosion sound to rear end of tail pipe?
yes, that is rich raw fuel in the muffler. plus Air.
if there are exhaust cracks and then engine goes rich this can happen( a double failure)
if how ever BACK means, back to the Air cleaner, then that be different reasons, (timing)


engine now starts.?>
engine runs.? has full power, car drives ok.?
JUST?
SURGE,. you never said.

does engine get hot? 180F or more and holds (y/n)
ever get a full tuneup this decade,
most dont so i tell you, bad spark causes, misfire and raw fuel is wasted to the exhaust and sure can go boom.

surging usually means the ISC can not control idle
so it hunts, (a suzuki software engine on all 90s engines)
PCM errors, inside it. (dangerous too)
a modern car, if idle goes too high the ecu commands the ISC closed
and holds it there solid, (safe way , no hunting allowed now)]
so if this car surges, it's , lean engine.

some think flooding is surging.
and this is usually below 800 rpm,
almost stalls, then corrects, seems like a surge.

next time post rpm range of surge.?????

do not drive a surging engine, do not be like Toyota drivers. (over 800 rpm hot)

surge from 400 -800 rpm is class 1 surge.
surge from 800 to say 2000 RPM is class2, and very dangerous to some folks, (key off, get car fixed, tow it)

The ECU controls idle speeds. (hard coded servo controls)

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