Speakin of "running rough"... - ZR-1 Net Registry Forums

Paul Workman · 08-02-2009

Regarding my miss/low compression issue, I was pretty certain I was dealing with a mechanical problem on my #8; a bent valve or broken valve spring, or ingested a screw or something?

But, I'm just a patient - not a doctor of LT5s. So, since I work only about 10 minutes from Marc H's shop (eat your hearts out!

) I ran 'er by Dr. Hiabeck's office for a visit.

I was pretty much resigned to an engine pull, and initially intended to inquire about going ahead with a 368 upgrade, as long as I was going to pull the LT5 and be "in there" anyway. But, I was surprised when Marc told me he was not at all sure it was a mechanical problem - could very well be - but(!) possibly the miss and even the low compression symptom could (over time) well have it's roots elswhere: injectors, coil, plug wire, or even the ECM. So! I've got a laundry list of things to eliminate before succumbing to an engine pull.

If it comes to that - an engine pull that is - I'm gonna give the 368 option a hard look-see! So, in the mean time, I'll be shopping for parts; pistons that will work on stock rods (this, according to Marc, has been done successfully at SGC), sleeves, rings, bearings, cam bolts, etc. And, if it comes to that, I'm hoping I can draw on the rich experience and talent that cruises this board. (Wouldn't even think about it, otherwise!).

All comments and suggestions = very welcome.

P.

08-02-2009	#1
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Speakin of "running rough"... Regarding my miss/low compression issue, I was pretty certain I was dealing with a mechanical problem on my #8; a bent valve or broken valve spring, or ingested a screw or something? But, I'm just a patient - not a doctor of LT5s. So, since I work only about 10 minutes from Marc H's shop (eat your hearts out!) I ran 'er by Dr. Hiabeck's office for a visit. I was pretty much resigned to an engine pull, and initially intended to inquire about going ahead with a 368 upgrade, as long as I was going to pull the LT5 and be "in there" anyway. But, I was surprised when Marc told me he was not at all sure it was a mechanical problem - could very well be - but(!) possibly the miss and even the low compression symptom could (over time) well have it's roots elswhere: injectors, coil, plug wire, or even the ECM. So! I've got a laundry list of things to eliminate before succumbing to an engine pull. If it comes to that - an engine pull that is - I'm gonna give the 368 option a hard look-see! So, in the mean time, I'll be shopping for parts; pistons that will work on stock rods (this, according to Marc, has been done successfully at SGC), sleeves, rings, bearings, cam bolts, etc. And, if it comes to that, I'm hoping I can draw on the rich experience and talent that cruises this board. (Wouldn't even think about it, otherwise!). All comments and suggestions = very welcome. P. __________________ Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry Last edited by Paul Workman; 08-02-2009 at 09:56 AM.