ZR-1 Net Registry Forums - View Single Post

Paul Workman · 12-14-2007

Keep in mind that I'm new to the ('90) LT5...

I may have been maligning the injector(s) for my occational rough idle. Yesterday I noticed a faint "ticking" sound that was in sync with the one cylinder that was not exactly missing, but just not running smooth.

Perhaps it will work itself out...I hope.

Fortunately it doesn't do it all the time, and when it does, it goes away after it warms up good, or after a quick 7000 trip thru a couple gears. (I've rounded up a fuel pressure gauge and am poised to do a leak down test. However, I checked w/ the dealer where I bought it, and they confirmed it as 16 new injectors. Yeah, I know. Trust...But, verify!

)

Which raises a question...(I almost hate to ask)...How much trouble is it to change one??? (Gosh...I hope there is simple solution to a sticking "lifter" (follower).

While I'm at it, and y'all don't mind another question, I am wondering about the cranking characteristic of these LT5s: The starter rolls quickly over what sounds like several compression strokes, maybe 4-5 rapidly, and then it is as tho it drags on one cylinder (starter RPM drops quite noticably) before resuming its normal quick cranking speed. (I'll try to describe it this way.. It makes a sound like, ye-ye-ye-ye-yer-ye-ye-ye-ye-yer-ye-ye-ye-ye-yer...) When it is cold (beit 40Âº or 3ÂºF so far) it runs thru 3 "yer" cycles - about 3 seconds of cranking before it fires. Is this typical? It has me

.

Neither of these items are putting my panties in a wad. They just make me wanna say Hmmmmm...for now. But, I've got all winter to tinker if need be and I just thought I'd ask the experts here what comes to mind on these (I won't call them "issues") things.

TIA,

P.

12-14-2007	#1
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Possible "follower" problem? Keep in mind that I'm new to the ('90) LT5... I may have been maligning the injector(s) for my occational rough idle. Yesterday I noticed a faint "ticking" sound that was in sync with the one cylinder that was not exactly missing, but just not running smooth. Perhaps it will work itself out...I hope. Fortunately it doesn't do it all the time, and when it does, it goes away after it warms up good, or after a quick 7000 trip thru a couple gears. (I've rounded up a fuel pressure gauge and am poised to do a leak down test. However, I checked w/ the dealer where I bought it, and they confirmed it as 16 new injectors. Yeah, I know. Trust...But, verify!) Which raises a question...(I almost hate to ask)...How much trouble is it to change one??? (Gosh...I hope there is simple solution to a sticking "lifter" (follower). While I'm at it, and y'all don't mind another question, I am wondering about the cranking characteristic of these LT5s: The starter rolls quickly over what sounds like several compression strokes, maybe 4-5 rapidly, and then it is as tho it drags on one cylinder (starter RPM drops quite noticably) before resuming its normal quick cranking speed. (I'll try to describe it this way.. It makes a sound like, ye-ye-ye-ye-yer-ye-ye-ye-ye-yer-ye-ye-ye-ye-yer...) When it is cold (beit 40Âº or 3ÂºF so far) it runs thru 3 "yer" cycles - about 3 seconds of cranking before it fires. Is this typical? It has me . Neither of these items are putting my panties in a wad. They just make me wanna say Hmmmmm...for now. But, I've got all winter to tinker if need be and I just thought I'd ask the experts here what comes to mind on these (I won't call them "issues") things. TIA, P. Last edited by Paul Workman; 12-14-2007 at 07:19 AM.