1993 Toyota Camry Camry Unsolved Mystery

MBRIDGES2

MEMBER
1993 TOYOTA CAMRY

Engine Performance problem
1993 Toyota Camry 6 cyl Front Wheel Drive Automatic 215K miles

Car suffers from sluggish acceleration below 4,000RPM. Even worse when cold. Condition remains identical even after purchasing.

-hp fuel pump and strainer
-fuel filter
-spark plugs and wires
-distributor cap and rotor
-egr valve
-air intake hose

Big props to the person who solves this.

7 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Hi there,

With all these problems it is alway good to make sure that the basics are OK, valve timing, ignition timing (done with the data link earthed out) compressions and no fault codes, (you don't always get a light on with a fault code. Also check the air flow sensor as these are often a cause of performance issues as is the TPI sensor. Start here.

Mark (mhpautos)

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Wednesday, August 20th, 2008 AT 5:23 PM

MBRIDGES2

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Mark,

Thanks for the reply. Valve and ignition timing are spot on, and I've got good compression. I thoroughly cleaned the AFM and sensor, (in addition to throttle body, etc), with no change in performance. I am not familiar with how to test the AFM sensor. I am also unfamiliar with how to test the TPS, other than to adjust it. I suspect that one of these sensors is the problem, thought I'm reluctant to simply replace them. I've replaced so much and I'm running out of money. Any help you can offer is very much appreciated.

Thanks!

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Wednesday, August 20th, 2008 AT 5:36 PM

MHPAUTOS

MECHANIC
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Hi there,

these can be tested with a multi meter, I feel that your problem may lie here, if the TPI has been moved that will cause all manner of problems, do you have a work shop manual? As it may give you all the values for checking these sensors.

Mark (mhpautos)

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Wednesday, August 20th, 2008 AT 5:44 PM

MBRIDGES2

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I have a multi-meter, but not a workshop manual. Without that, I haven't a clue where to find the numbers. I assume I need the manual to check the TPS too. As a side note. The car seems to accelerate *slightly* better immediately after I make a hard stop.?

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Wednesday, August 20th, 2008 AT 5:56 PM

MHPAUTOS

MECHANIC
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Hi there,

That is a bit strange, the only thing that is in common there is vacuum, I will look up the specs and try and post a data sheet here, but I may not get it done till tomorrow your time, ( I am in Australia) as I need to access my home computer to get into the data base I need, I will try and do that tonight my time ( it is only 9-00 AM now) and I will be away for a few days so just leave a note if you need more assistance with this one, and I will get back to you when I get home, good luck.

Mark (mhpautos)