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If you smell fuel, it could be a glogged filter, it could be a bad fuel pump, it could be a bad ignition coil, it could be a bad catylatic converter. I would guess though by the info you gave, that the coil shorted out due to a faulty plug. Look under the car also for any sign of leaking fuel, your best bet at this point is to have a scanner hooked up to it to more closely pinpoint the problem instead of guessing and spending a lot of money on guessing
Hello When the service engine soon light (Also called the check
engine light) is turned on this is to alert you to the fact that
powertrain control module (computer) has detected a failure somewhere
in the systems it controls, this can be the transmission or the
engine or emission system, there are fault codes set in the modules
memory for these faults. What needs to happen now is to have the
powertrain control module scanned with a special tool called an OBD2
electronic engine control scanner or a OBD2 code reader. Once the
code(s) are read then you must perform the diagnostics for each code
and make the appropriate repairs based on the findings of the
diagnosis that was performed, this is called doing "Pinpoint"
It's normal for the cat to get hot - given they've replaced everything (just about) that could cause your problem - they have not looked at the injectors and O2 sensors. If you had something burning in the engine bay it was most likely electrical and you should look for burnt wires. You probably have a short in the ignition system or fuel injector wire harness. It's nearly impossible to diag a problem like this without having the car first hand. It must be throwing check engine light codes. Get the codes and post them. Also try a different shop at this point.
First thing i have never seen a sealent that would fix a bad head gasget, secound if you got water in the cyl. than most likely there is water in the oil witch over a short period in time will do damage to the vitals in the bottom end. Third for them to tell you that a sealent might fix the leak i would be getting a secound openion.
The ford focus suffered from leaking washer jets. The water leaked down into the recess for the spark plugs, causing them to misfire.
Sometimes this put excessive load on the ignition coil and it failed too.
Also i have had, worse case is the coil short circuits back up the earth switch, back to the ECU, blowing that.
The car still runs but only on 2 cylinders.
that light is the engine warning light you should go and have your car checked over at a garage running very low on oil can cause some serious problems with your engine. you'll also have to go to a garage to get them to turn your light off.