Ok, this is taking a long time to type, i slammed my middle finger in the truck door, but...

I was trying to pass a person, and sped up, they increased speed, so i increased, and they increased and so i hit the gas harder and it down shifted to like 2 or something, and this guy couldnt keep up, but didnt give me rook to pass him so this car was ahead of me and i slammed my brakes, he went by, then i hit the gas and my truck started to shake... i thought it was tq verter shudder and then i hit it in neutral, and it was real shakey, pulled to a safe area, and shut it off. now, i get a misfire on cylinder 5.

we(my friends an I) learned that its kinds shaky idle but drives ok, not a full misfire, so we pulled plugs, looked ok, did a spark test, cylinder 5 was erratic and weak and strong and weak and strong. as u increase revs it gets better. we pulled cap rotor off, swapped cap, rotor looked good. checked wires for resistance and continuity and good within spec. swapped wires and still weird fire on cylinder 5. code scanner ran diagnostics on it, specificly only cylinder 5. we are thinkin cam sensor, but i cannot tell you how bad i feel right now. this is my baby. main mode of transport, my life and all my hard work goes to her. i want her not doing this anymore. what do you guys think? were leaning to cam sensor because thats what tells the computer to discharge spark.

but let me know what you think. i really would not want to drive this to work, but i work at 8-7 and i got nothin else. my SES lite isnt flashing, but yea... any info or insight would be massivly appreciated.

 

Check the ignition module? If it's not a spark issue, might want to do a compression test as well.

 

well we pretty much got it down to electrical. with a spark tester in line, its got erratic and weak and strong sparks. only on cylinder 5. weve swapped plugs from another cylinder, swapped wires from another cylinder(taking them off each port and actually swapping them) weve done the cap, it looked like cylinder 5's contact point was bent, but autozone doesnt warranty ignition parts... so, we dont think its compression, and the idea that its specificly one cylinder with the erraticly strong and weak spark...

 

Autozone doesn't warranty ignition parts? Idk about that, around here they do. If not then you need to start buying your parts from O'reillys. I've warrantied plenty of ignition parts for wear.

 

well... he looked all through the system. dont warranty it. so, luckily my buddy works at napa, hes gettin me a rotor jus to see if thats it, and a cam position sensor just to see if thats it. and my finger nail is purple and red from pooled blood, it sucks typing. darn doors...

 

anyone?

 

I've never seen a cam sensor cause a single cylinder misfire before, but I guess anything is possible. I always like to get the basics down on paper first though, fuel, spark, and compression...

 

nope. i found the problem. static compression is 150. running is only 50. should be 75. so, theory states possibilities are: bent push rod, bent valve, bent rocker, weak spring, or a far fetched idea that the cam lobe is worn
I have had a tick on cylinder 5 for 2 years. bought new roller tipped rockers and stock pushrods last year, havnt done it. now im gunna lol. but yea... it wasnt spark. my truck increased the fuel 5% on the right bank to compensate. and since im only 25psi off i am almost sure its just misadjusted rocker otherwise if it was worse it would be much worse compression. im just happy i have a ride to get to my english final and business final. then yeah im gonna work on this thing. but i was more mad at myself for not doing it when i said i was gonna. and im happy that its top end not bottom end. yeah... this is what tick does when it gets pushed into the back burner. guy said some camshafts were soft and known to wear out... i have never heard of l31 cams lobe wear that much that suddenly. or for that matter wear that bad on one cylinder. but, if chance its bad valve, ordering edelbrock heads. figure why not. that was next years treat but lol. yeah... i need more money

 

I say 95% chance that you bent a valve, other 5% a pushrod. Good time to start doing some serious mods. Good luck man

 

eh. i dunno about that bent valve. bent valve would mean i also killed a valve seal, thus burn oil. and theres no burning oil, no coolant leak, nothing really at all. and bent valve would mostly mean i would have worse compression. my compression is just about even across the board too. also, bent valve would give a noise, my truck, sounds absolutely fine, you just hear the miss, and the tick. bent valve would be louder correct?