I own a 2001 Toyota Tacoma with 48,000 miles on it. I used MPG-CAPS as prescribed for 1,100 miles, aprox. 4 tanks of gas. On June 6, 2007, I tried to start my truck to pull it out of the garage and it would not run!
Compression and leak down tests revealed the engine had 0 psi compression.
Disassembly of the engine revealed all intake and exhaust valves had carbon between the valves and seats.
MPG-CAPS claim to do 3 things; increase fuel mileage, reduce emissions, and reduce internal carbon. That is exactly what happened. There was a suuden dislodging of carbon inside all of the combustion chambers at once. The carbon was trapped between the valves and valve seats, which caused the the engine to lose compression. Without compression the engine cannot run.
The only remedy, is to completely disassemble the engine and clean the carbon out of the valves and pistons, and then reassemble, just like an engine rebuild without all the new parts.
I have good digital photos of head and cylinders.The combustion chambers have a copperish colored film, just like the photos in the MPG-CAPS sales brochures. This copperish colred film is not a normal condition. I e-mailed the photos to FFi's compliance department. I have had a 3 way phone conversation with Jerry Lang, their combustion expert.
In that conversation, he recommended that FFi settle and move on. Instead FFi had me ship my cylinder head to a lab in Texas for analysis. Spectrograph test and the lab tech confirm something unusual happened in the combustion process and the only thing different was the MPG-CAPS.
I have been without my truck for 2 1/2 months now, it has been 1 month since the lab results came back and now I'm being ignored by FFi. Their own trusted expert recommended settlement and they refuse.
Pagosa Springs, Colorado