1993 Toyota Camry Camry Unsolved Mystery

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)

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!

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)

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. ??

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)

That sounds great Mark. I'll look for that post. Take your time, I appreciate the help. In the meantime I'll check my vacuum lines thoroughly. Cheers.

Hi there, a few tests to go on with...