what were all the other cylinders PSI?
P303 is driving me nuts
- Thread starter GMAN
- Start date
what were all the other cylinders PSI?
GMAN
Dedicated LVC Member
All of the others tested over 100lbs.
jt351
Active LVC Member
Well even if the weak one was 120 that would not miss.
GMAN
Dedicated LVC Member
The process of elimitation isn't working for me. I've done spark plugs (764's), replaced coil on cylinder 3, and the boots on all of the rest of them, I've even changed the fuel injector with a new motorcraft one. What else can I be missing? Do I go back to square one? I am going to try Motorcraft plugs next. Just in case the plugs got fouled up or something.
jt351
Active LVC Member
Is the injector clicking on that cylinder? You can buy a cheap stethoscope with a probe to hear if it is clicking, or use a test light to see if it flashes, It should have +12 all the time on one side and a pulsing ground on the other, so to check it, first check if you have 12 volts on one side, then put test light across the wires and it should flash when running. this is also true for the coil, check it with the test light.
I was looking for the "rest" of the compression test results, for a reason.
I'm suspecting you have the "oh so dreaded" broken/weak/getting ready to break valve spring.
it's not that common on a second gen, but it's not outside the realm of possibilities.
What were the rest of the engines compression results???
