This sound like a broken valve spring?
Thread Starter
Launching!
Joined: Nov 2001
Posts: 219
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From: Westminster, CO
This sound like a broken valve spring? Coming home tonight my 2000 Z28 started running rough. Now it is quite common for the SES light to be on with idle mis-fires due to my MMS Stage IIx heads and cam. Well the light started blinking, I heard a clattering from the engine. I was pulling over when the car just died. It wouldn't even start up, but it would turn. Left it there and got it towed home. Too dark to pull the valve covers, but I'm fearing a valve spring. I hit the rev limiter a couple times this weekend doing a burnout is the only thing I can think of. Got about 1000 miles on the H/C.
Re: This sound like a broken valve spring? which springs are you running??
when mine went the car went to hell. I knew it right off the get go, cause it felt like i was runnning off of 6cyl!
all i could do was idle home(luckly only 1min from the break!)
i hooked up to atap and i was reading like 100misfires on cyl 4 under current history. I thought maybe plug or wire was bad. Switched those.. still reading misfires.. My idle was iffy cause i couldnt really tell with the cam. But something sounded weird at idle in the exhaust. I heard NO CHATTER!!! so i didnt think I had a broken 918. Anyway i pulled the valve cover on the pass side with the misfires. Checked #4.. hmmm looks fine... tried to twist the intake spring.. still tight! Then i tried the exhaust side and OMG it was just barely there! It had broken on the back side so i couldnt tell at a glance.
btw, when trying to start the car had a PITA! Its like it would only fire on 6cylinders. Well really it was only firing on 7.
Pull the covers! I beting one snapped... ill keep my fingers crossed for ya!
but if you have 918's this sucks cause mine broke at 200 miles, and now im getting close to 1k <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />
when mine went the car went to hell. I knew it right off the get go, cause it felt like i was runnning off of 6cyl!
all i could do was idle home(luckly only 1min from the break!)
i hooked up to atap and i was reading like 100misfires on cyl 4 under current history. I thought maybe plug or wire was bad. Switched those.. still reading misfires.. My idle was iffy cause i couldnt really tell with the cam. But something sounded weird at idle in the exhaust. I heard NO CHATTER!!! so i didnt think I had a broken 918. Anyway i pulled the valve cover on the pass side with the misfires. Checked #4.. hmmm looks fine... tried to twist the intake spring.. still tight! Then i tried the exhaust side and OMG it was just barely there! It had broken on the back side so i couldnt tell at a glance.
btw, when trying to start the car had a PITA! Its like it would only fire on 6cylinders. Well really it was only firing on 7.
Pull the covers! I beting one snapped... ill keep my fingers crossed for ya!
but if you have 918's this sucks cause mine broke at 200 miles, and now im getting close to 1k <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />
