Getting Fed Up With My Focus

[TBIDDY83]

So I have Toms tune installed on my car and it is still running like crap. I reinstalled my original back up and it still runs like crap. It still wants to die when coming to a stop. It still hesitates and bogs down all the time. It still wants to die after ilding for a while. Im not sure what to do. I put on a new IAC and a TPS but it still didnt help. All I have done to the car is a cold air intake. I heard that Toms tune would fix these problems but it didnt. I dont even feel a slight difference in how the car run or drives. What should my next step be. At this point I thinking that Toms tune might have been a waste of money. Any suggestions. Thanks

[josejsanchez]

damn. buy new plugs, cables. fuel filter, change oil get a whole tune up. reset your ecu... try toms tune again..

[captcomputer]

Get some electronics parts cleaner or a compressor and spray your MAF. Make sure it is getting a good clean reading. Double check your connections and hoses.

[besthaticouldo]

i hear ya brother...it sucks

[TBIDDY83]

How do i reset my ecu?

[Spider]

I think you just unplug the battery for a couple min than hook it back up and let your car idle for 5 min.

[samus]

Originally Posted by TBIDDY83

How do i reset my ecu?

disconnect battery for 30 minutes (actually 5 minutes will do it, but just to make sure...)

try CRC mass-airflow-sensor cleaner and spray about 5 seconds of it directly onto the MAF components (disconnect the air filter box torx bolts) and check your plugs for proper gap and condition.

unless you have mechanical problems, uncommon on SVT's aside from transmission-related, it is most likely electrical be it ignition or sensors.

if your fuel system was at fault, you'd get a check engine light, there are 3 sensors for the fuel feed that detect pressure, starting from the tank and ending at the rail, so that system is closely monitored.

[Master-Baits]

Replace fuel filter, new plugs just to eliminate the possibility. Connections at battery terminals, use tune up grease and make sure they are tight fitting. Just eliminate all of the small trivial stuff first before you start freaking out and do something more expensive than was needed.

[svt0251]

vacuum leak is possible, alternator

[itbparada]

i had a problem that was pretty much showing same signs quite a while back. It ended up being a vacuum leak.

Check the 90* hose going off your PCV valve under ur header. That 90* fitting was cracked all the way through in 3 places and just crumbled when I tugged on it. That was quite a while ago ... say around 50k miles? Took me over a week to figure that one out. Id change ur plugs/wires/fuel filter either way if they are original.