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questions

I recently had my Mustang's clutch replaced and when you start out in 1st gear, the car is slow to accelerate. Even when you try to floor it just slowly climbs to a higher RPM. When I originally bought it, you could floor it and the tires would spin. Is it possible I got a bad clutch installed?

It's been a problem for a few years. Everytime it rains, I see a puddle of water in the back seat of my car and the floorboard is wet. The top has no visible holes or cracks and it still looks new.

Hello Car gurus.
I have a Ford Mustang 2005 with 17,000 original miles on it. Last year I noticed that the engine light came on after taking it to get the wheel alignment done. I checked it on one of those hand held OB11 reader unit, and it popped up as P0420 and a pending P0430 code.
Many people I ask are saying it's the CAT that may have gone bad, but is that possible since I barley drive the car? There were some modifications done, including adding in a performance chip, plus changing out the headers, and the air filter.
However, those mods I mentioned were done over 7 years ago, and no issues with check engine lights, or passing the emissions since.
Can someone let me know if it's possible that the CAT could go bad in 10 years at 17,000 miles? Should I just change out the O2 sensors for the bank 1?
The readiness monitors seems to all be showing green, but since it's throwing this code I think it may not pass emissions.

How to proceed....?

Car stopped and wldnt start until I replaced the GPS now it won't ideal correctly nor receive gas when I mash on the peddle

Recently my engine began to shake and the engine light turned on. I soon discovered 6 of the 8 spark plug coils had gone bad. I replaced all eight but still the car shakes a bit while parked or stopped. I took it back and they suggested fuel cleaner.For the most part it has helped. My engine sounds good, moves great, and getting better gas mileage, but still there is a slight "kick" and shake when I am stopped and feel it more in park. I'm not sure what could be wrong.

Put key in door, windows come down & won't go back up, locks don't click, lose radio, headlights, turn signals, air conditioning/heat/defroster. Have installed new ignition switch & new relay device and have 2 new keys. Also trouble shifting out of park when starting car. Car starts and runs fine, battery & alternator fully charged.

I need to pass my CT state emissions test for my registration, but 4 readiness monitors are not engaging. It's mostly garage kept, has 14,000 miles, has a big K&G cold air intake, and the previous owner had a super chip tuner installed. Recently the battery died so I was told I needed to drive it more so that the CAT, O2 sensor, and EVAP, etc... can engage. After driving over 200 miles so far no dice.
1. What's the exact/proper drive cycle for a 2005 Mustang GT so that the monitors will come alive?
2. Do would suppose the super chip have disabled the monitors in anyway?
3. If I can't get the monitors to engage, would I need to reverse the tune back to the factory tune?

Thanks in advance

Mustang Suzie

Had a shop check code and said it was timming problem and may be caused by using wrong oil filter and that my engine might have to be replaced. other than tapping noise engine runs fine. i feel no loss of perfomance and have put several miles on it since and have not babied it. replace entire engine? really.

ticking sound coming from the top of the engine on the right side, during idle, and gets louder at accelleration!

Replace Throtalbody on 4.6 L engine ?

I recently drove from MA to FL in my 05 mustang gt (k&n intake,borla exhaust add-ons) Prior to driving here the fuel filter had been replaced as well as all replaced all my spark plugs and cleaned out the air filter. Once i got to FL i had my gas mileage up to 20 mpg..I normally average about 17-18 and everything was running fine. A month later my check engine light came on and my gas mileage started decreasing by the day. I am currently at 15mpg which is very out of the ordinary for my car. When i come to a stop light the car will start to idle very hard, almost feeling like it will stall out when you go to step on the gas again and rumbles. I had the code checked but lost the paper, i believe a few different things came up, possible o2 sensor, a/f ratio etc...not exactly sure. I have been told that a common problem is the fuel regulator. Any ideas? please help