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Re: Flat spot /backfire
Hi and welcome to FixYa,
Initially, pls check the airbox, air cleaner and how the assembly is fitted. Backfire on deceleration indicates lean mixture (too much air, too little fuel). A flatspot could be anything, let's try the air cleaner/box first and proceed from there. Might get lucky to solve both problems with 1 solution.
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Any imperfections or flat spots will be worked out after you drive a few miles to get some heat into them. Some tires even develop flat spots overnight. It's normal for pretty much all tires...Keep driving on them, may take 500 miles of easy driving...It may make you nuts listening to the noise until they round out after some driving...saailer
The most common reason for backfiring is lack of back pressure from changing the exhaust. To compensate for the flat spot you get you put in a jet kit. This leaves the possibility of more unburned gas getting into the exhaust. Honda uses Kei Hin carbs with a fuel shut off diaphragm to help limit this condition (backfiring) by turning off the fuel to the carbs during deceleration. Even stock exhaust can pop or backfire. Typically it is caused by air getting into the exhaust either past the copper o-ring gaskets in the head or leaking muffler connections from the head pipes to the mufflers. Try replacing all the exhaust gaskets and you should minimize this condition.
It's hard to say "this is it" without more info such as when did the problem start happening? Did it just happen out of the blue one day where you went out to start it and it wouldn't start? Did it happen after changing spark plugs? Were there any issues/symptoms the last time it was running and you rode it?
If you changed plugs, check the plug wires. They may be on the wrong plugs which mixes up the firing order and would definitely cause what you are seeing. If it just started happening out of the blue, were there symptoms of hesitation the last time you rode it? Any flat spots in the acceleration when you twisted the throttle? Did it bog at any point in the RPM range or backfire when you let off the gas? The backfire and cough are usually related to timing issues but you should have seen symptoms the last time you rode it if the timing started to get whacked.
The wiring harness routing is critical on this car. Any incorrect routing, and a short can easily develop. If you took some photos before, and as you did the work - perhaps you can check the routing. The route of the main harness behind the Throttle body and each cylinder's main intake port - is critical. I've owned a 1988 Camry since new. Pulled the engine out and replaced the timing belt several times. (Just found it easier.) Once, I got the harness routed just a little bit wrong, then the car drove for a few miles and quit. Turned out to be a little rub spot had shorted a wire - killing the fuel pump. Just a tiny spot - took a long time to find... Before throwing more parts at the car - check carefully and very slowly for any open rub spots in the harness. If you have a source - verify wire routing... Good luck.
FYI: The Coil in the 1988 Camry is located in the distributor. It is easily checked with an ohm meter. Generally, doesn't go out.
The clicking noise is created by flat spots on the fuser rollers. The flat spots on the rollers create a ?chatter? in the fuser gear drive train. This noise does not affect the performance of the printer and does not affect print quality.
All new fusers are shipped with restraints that keep the rollers separated during storage. If the fusers sit without the restraints installed for a period of time, flat spots can develop on the rollers which can result in a ?thumping? noise and will create a ?clicking? noise in the fuser gear drive train.
If a printer sits idle for long periods of time, flat spots can develop. If Power Saver is disabled and the printer sits idle for long periods of time while powered on, the flat spots will develop at an accelerated rate. The clicking noise is created by flat spots on the fuser rollers. The flat spots on the rollers create a ?chatter? in the fuser gear drive train. This noise does not affect the performance of the printer and does not affect print quality.To decrease the possibility of flat spots developing, set Power Saver to On with a Power Saver Timeout of 30 minutes To decrease the possibility of flat spots developing, set Power Saver to On with a Power Saver Timeout of 30 minutes. If a printer or fuser is not going to be used for an extended period of time or will be placed in storage for future use, re-insert the fuser restraints. The fuser restraints can be in place and the fuser installed in the printer