Re: Throttle hesitation diagnostics?
 

I would get a new PCV Connector from Jerry that fits tight and you do not have to concern yourself with it popping off again. That PCV connector you are cleaning has had its day :D

Oh....and when you get everything out of the valley......I started with a scraper........then degreaser....then HOT high pressure washer......then steel wool :D.....then more degreaser and then a final HOT high pressure washer.....and blow on that valley drain with compressed air after first squirting degreaser from the top down.

I put just a tad of anti-sieze on the plug threads and torque with 1/4 inch socket and spark plug adapter by feel (snug tight but not too tight) :D

Re: Throttle hesitation diagnostics?
 

Ignition coils I believe. Looks like they were replaced at some time. Measure them ohm wise. I agree with Dyno. I bought new rubber fitting from Jerry and it is nice and tight. Be sure to check the rubber pipe for cracks by flexing it. I had 5 holes in mine.

Re: Throttle hesitation diagnostics?
 

OK....have to ask.....who in their right mind would work on an LT5 during initial restoration wearing a nice White Sweat Shirt.....:sign10:

Re: Throttle hesitation diagnostics?
 

Dyno, notice the fingernails too--- no dirt. He must be a surgeon. White sweat shirt, no dirt.

Re: Throttle hesitation diagnostics?
 

Right mind? Me? :sign10: That's a good one! And you'll know who's NOT right mind when you see it dry-fit all together, and then UN-plugged AGAIN.

No dirt? That's FILTHY. Cliff's is clean http://i17.photobucket.com/albums/b7...lpacdetail.jpg

Clean as you go. Schrade's rule of :thumbsup: . Sterile Spic n Span clean. Probably get it all perfect, and never find out what made the 'Hesitation'. WAH. :-({|=

Makin' a list for Jerry's (and checkin' it twice)...

No di-electric grease on the Coil Pac prongs?

Photos
 

Keep up the great photo coverage.......

Where are your photos stored and you have thumbnail as well as larger photo (both....how does that work)?
My photos are stored on photobucket and I recently had to upgrade to Photobucket Pro because of a bandwidth issue. But then again I have over a thousand photos viewed on a couple Forums :D

I have three photos (total) of a Semi Truck and Grain Cart in a corn field stored on this web site (in my public profile) which someone complained that was poor use of bandwidth one time but you know how that goes. I used those photos to show that alternative of using this Forum as a photo host vice Photobucket and to also show photo sizing (those three photos I have stored here (Public Profile) are of three different sizes if you click on them).

That is ZR1Vette photo....here are my photos :)
I think I destroyed about three red sweat shirts along the way with oil stains I could not remove :D
I buy Simple Green in BULK (for clothes as well as hands).

1990 LT5
http://i287.photobucket.com/albums/l...b1ba5026d5.jpg

1991 LT5
http://i287.photobucket.com/albums/l...510aaf14f2.jpg

1990 L98
http://i287.photobucket.com/albums/l...631b879eb6.jpg

Re: Throttle hesitation diagnostics?
 

Nice engine bay pics dyno. Did you do all of the work?
Schrade, do you remember if your engine hesitation also occurs on open loop 1.6% - 2.4% TPS (cold engine) as well as closed loop (hot engine)?

Re: Throttle hesitation diagnostics?
 

Yep......and have the destroyed clothes to prove it now used as rags :D

Re: Throttle hesitation diagnostics?
 

The dielectric grease wont hurt anything and is not a bad idea. Any thoughts of spraying the plenum since you spent all that time cleaning it? I know your chasing another problem but you will hate yourself for not doing it while you are there. D

Re: Throttle hesitation diagnostics?
 

Schrade, do you know if those are the original injectors? Reason I ask is mine looked just like those before I replaced them with SS.