Sorry about the length but I don't know these cars and am trying to include enough info. I hope I've selected the correct section. My daughters 93 V6 Camry has lost power. She brought this to my attention so it's noticeable. I remember the same thing happening to my wife's 92 V6 Camry. We traded that one in on a 99 V6 (that's a whole different story) before I found out what caused the poor performance. I've gone to two shops recently for them to check it out and they both say it's fine; wrong. Both the 92 when traded and the 93 now had/have 110 to 120 thou on the clock. I doubt whether either had a tune-up, ever. The 93 car does not miss even at 5 thou or above and with the exception of a recent stall after start up bout which seems to have cleared up and a stall after a prolonged highway run (4-5 hours), which also seems to have stopped (maybe bad gas), it continues to run flawlessly except for the loss of torque. I'm wondering if the continued ignition system degradation is computer compensated for by retarding the timing because if it was a small block Chevy that's where I'd be looking. The fuel filter was changed with the timing belt 10 thou ago. Anybody got any direct knowledge or ideas? Thanks for your thoughts in advance....Frank
I have a 1992 V6, which is that same as yours. My car has never done this, but if it was doing this, I would first check the spark plugs. Do this by pulling one from the front bank (the easy ones to remove) and inspect. If they look old and/or worn out, replace all 6 plugs. I recommend using regular NGK platium, no splitfire or +4 or anything like that. If your engine doesn't missfire, it's likely not your plug wires, but your rotor and distributor cap could be a problem. These are cheap and should likely be replaced anyway. These are easy do-it-yourself changes (except maybe the rear bank of spark plugs) that should help. Let us know how it all goes, for future reference.
Thanks! That's probably a good place to start. I've hesitated to change the plugs because I'm under the impression that when you go after the rear 3 the plug wires invariable brake and are costly to replace. I assume the cap & rotor are pretty straight forward to replace, no? While it's still not missing I'm still wondering if the computer is programmed to automatically retard the timing on a worn ignition system. This would then account for my sluggish performance? Although it did come on quite quick. Any other thoughts, anyone? Frank
That could be, but the worn ignition system would definitely be a factor. Check the plugs, see if they're bad. If not, then you go straight to the rotor and cap. If you think about it this way: Corrosion is not your friend, and in your ignition system, the only gaps in your connections are in the rotor/cap, and the spark plug electrode. Cap and rotor are REALLY easy to replace, you should remove some of your intake system, but that's easy. They're also real cheap too. Plug wires are NOT CHEAP, so be SURE that's the problem before replacing them. Also, listen to the exhaust. If there's a pulsing, one cylinder is not firing. This could be a plug, wire, cap or rotor. If only one of your plug wires are broken, I have an old OEM set (minus one wire that broke, #5 I think, back bank, driver side I think) that I can send you! Let me know.
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