air filter

[nsks475]

hi i have a 92 lc it ran fine sence i got it a year ago but when i replaced the air filter it started missing and backfiring and lost about all its power i tryed eveything i can think of to fix this i put the old one back in i check all my wires even got 93 octang gas with fuel injecter cleaner. any ideals as to why it whould start acting up over a airfilter whould be apreceated thanks

[Towncar]

Originally Posted by nsks475

....any ideals as to why it whould start acting up over a airfilter...

Hmm.. the other guys know the 1992 better than me..

I'm guessing the MAF sensor was disturbed or disconnected. Did these ones have a MAF on the Inlet Hose guys??

Are you seeing a "Check Engine" lamp on the dash?

Regardless; Check the electrical connections on the Air Filter Box lid and Cool Air Intake Tube.

[junk yard doggie]

There is an air sensor that screwes into the side of the air box. You might have some crud down in it, or the wire got knocked loose. Try cleaning the sensor. I believe it's in the lower half or the air box. I'll have to check, but I might have one of those sensors in my stash of stuff.


Mike

[nsks475]

i have two senors on my air box one screws right in to the plastic and one is mounted on the metal snout i think that one is maf im not sure what the small one that screws in to the plastic is but i cleand both nothing happend any other ideals

[sreilly77]

Originally Posted by nsks475

i have two senors on my air box one screws right in to the plastic and one is mounted on the metal snout i think that one is maf im not sure what the small one that screws in to the plastic is but i cleand both nothing happend any other ideals

i had the same problem with my old 92 crown vic. as stupid as it may sound, the problem was that the lid of the air filter box was not sitting properly and caused the car to run rough. so i took it off and put it on and it was fine. could be something as simple as that!

[Towncar]

Are you seeing the 'Check Engine' light on the dash?

[nsks475]

no the check engin lite doses not come on

[Towncar]

Originally Posted by nsks475

no the check engin lite doses not come on

Well then, you'll have to change your avatar to a front shot, with the hood up

[Towncar]

OK, I'm thinking... misfiring, backfiring.. OMG!! I was just joking about the Avatar !!

Sounds like this would be ignition related. You have two Coil Packs, 4 wires each. Both get a signal from the Crankshaft Position Sensor to fire <through the EDIS module>.

You should rule out the Ignition System - Coil Packs, and the Throttle Position Sensor as suspects before you move on to the fuel system.

If a Spark Plug Wire is disconnected while the engine is running AND there is NO change in the running performance, that cylinder is where a problem exists.

The problem might be a bad Coil Pack (no spark, weak spark) fuel delivery, or worse.

Unless something else was disturbed, this can't be related to a new Air Filter.
You may want to remove the Cool Air Inlet Tube completely and inspect the Throttle Body for foreign matter. Also, have a very close look at the MAF wire to be sure it's not fouled.



MAF Shots:



Air Intake System:

[nsks475]

i have cleaned and check both of thous wires on the maf it did help tell the motor got hot then it started missing again it might be a coil pack i had them test it at advance and there computer thing said the number 3 coil was fulting dont know witch one that is if you know could you tell me. i know i have two coil packs, are they spret in side or do you have to replace all of them.

[Towncar]

Originally Posted by nsks475

i have cleaned and check both of thous wires on the maf it did help tell the motor got hot then it started missing again it might be a coil pack i had them test it at advance and there computer thing said the number 3 coil was fulting dont know witch one that is if you know could you tell me. i know i have two coil packs, are they spret in side or do you have to replace all of them.

The numbers are embossed directly on the top of each Coil Pack, right next to where the Spark Plug wire sets in. I believe #3 is on the passenger side.

PS: I lied, the numbers are embossed onto the Wire Boots....



PS:
According to RockAuto.com.. your looking at $40 to $70 depending on brand.

[nsks475]

ok i have whent thru and check all my wires and im thruing a good two inch spark on all of them

[Towncar]

Originally Posted by nsks475

ok i have whent thru and check all my wires and im thruing a good two inch spark on all of them

Sounds like it's running fine at idle, no missing, no backfiring during this test?

I had the same problem with a Camry, Coil Pack heats up then pop, sputter, bang, ping, 10% horsepower.... it was also throwing a great spark when it was cool or not under load.

Is there any fluctuation in idle speed when a plug wire was pulled off? I mean, was there one that you pulled off and there was no idle effect? If so, that's a cylinder that might have a clogged Fuel Injector, bad Spark Plug, etc.

[nsks475]

evey one i pulled off all must killed the motor p.s bad ideal to pull of well motor is runing thay have a lot of zap at your fingers