The other day I was driving home from school, My car had been outta the shop for about a week now. It just finished gettin bored 20 over pistons rods and cams, And I noticed my afr's being really high so I lowered my boost down to 15 and hit wot for about a second in third gear to see what they were at so I could bring it back to the shop, and it broke. The shop is telling me that the electrode on my first spark plug broke off and now I have no compression in my first cylinder... Any Ideas on whats wrong with the motor or how this happened?

 

anyone have any ideas?

 

Haven't heard of that happening before, just the electrode broke off? Maybe it was weakened by improper gapping. I hope you get it all figured out.

 

ya just the metal tip broke off in the combustion chamber, and now I have no compression. What do you think could have happened to cause it to lose compression??

 

oh damn, a little piece of metal jumping around in there its hard to say what might have gotten screwed up...
if the plugs were gaped by pressing against the electrode to widen the gap, as lil said, it may have weakened it and be the cause of the plug breaking.

 

So the shop finally got back to me and what had happened is that apparently a fuel line that goes to my fuel pressure regulator had been burned in two places causing me to lean out. I melted my first and secong piston due to it leaning out. How does this fuel line get burned like it did??

 

any ideas?????????????

 

Probably a bad installation. Who put the fpr in? Being that the motor had recently been yanked, my guess is that when it all got put back together, they werent paying attention to the fuel lines.

 

Ums put the fuel pressure reg on and then I got the motor built. Like 9 days after the final tune ( I had to wait 500 miles til I could get it tuned) and now its boke. Brand new pistons with less than 1,000 miles on them are now melted.

 

Did you talk to UMS about this yet? That is unacceptable.