Question about 1997 Toyota RAV4

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The first starting for the day, my RAV4 will stutter and most times cut off. Starting after that, it would start and run smooth. Also the engine kind of momentarily lags when i accelerate. Changed air and fuel filter, plug. Don't know what to do! I'm thinking my catalytic converter is blocked up.

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  • Toyota Master
  • 53,768 Answers

Unlikely as faulty cat converters will cause problems under load and at rpm
check for fuel pressure problems and faulty u regulator not holding pressure over night

Posted on Jan 27, 2018


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Posted on Jan 02, 2017


Toyota Ed

  • 1861 Answers

SOURCE: 99 tacoma

Still need the codes.
Injectors can go "bad" in a couple of different ways; all they are is an electromagneticaly controlled nozzle. When the ECU "fires" the injector, it pulses a ground circuit for 4-8 milliseconds, the electromagnet powers up, the valve at the bottom of the injector opens, and the fuel shoots out, under pressure. The wire can be bad/chafed/corodded/ The electromagnet may be weak. The nozzle may be stuck. Lots of things. But, to put in an injector for a number 4 cylinder misfire (p-0304 code) would be one of the last things that I would do.

Posted on Nov 21, 2008



  • 2007 Answers

SOURCE: 1991 toyota 4runner v6 auto rough start

Possibly a leaking head gasket. Water/antifreeze seeps into the cyllinder when it cools off, and then it won't fire properly until the coolant is blown out the exhaust when you start it. Let it warm up with the rad cap off. If you see bubbles continuously coming up to the filler hole, you have a head gasket problem. Do you have to add coolant monthly, or weekly?
If you're lucky, it could be just a spark plug that doesn't want to do anything until it warms up, or it could be a valve.

Posted on Apr 29, 2009


Philip Long

  • 1486 Answers

SOURCE: 1999 Tacoma 4x4 Trouble starting once engine is warm

Change the air temp censer.

Posted on May 31, 2009


  • 1 Answer

SOURCE: I have Toyota Landcruiser Prado

porous fuel tubing after the diesel tank

Posted on Jul 18, 2010


  • 1 Answer

SOURCE: toyota rav4 2.0 d4d, hesitates on acceleration

Look at this thread -seems to be a cure for this problem.

Posted on Sep 03, 2010

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Hi Rick, Good afternoon.

Usually black soot on your spark plugs indicates a rich air/fuel mixture. This can sometimes be fixed up with some basic maintenance. This can involve also changing your spark plug wires. The other thing that you should check out is the fuel pressure. If the fiel pressure is too high then this can cause the ratio to be too high. You should also check your timing. On newer vehicles timing cannot be changed however if it is off then this could indicate a problem with the engine's computer. Another cause of black soot can be that your air filter is EXTREMELY dirty. Go ahead and check these things out and get back to me if they did not fix anything.

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