Stumbling issue gone??? - ZR-1 Net Registry Forums

Paul Workman · 02-10-2008

Well, I spent the better part of today pulling the plenum and replacing the coils and wires.

Among other things, I discovered-

-a vacume line that connects to the underside of the TB's chin that was NOT connected.
-MICE had been nesting in the valley of my LT5 and they made a mess of the coil pack area.
-one plug wire had what looks like a nick which would be introduced by an rodent's bite. The rest looked dirty, but other than than they seemed to be free from more bites. (So, I'll clean 'em and keep 'em 'case someone wants 'em later.)
-the torque on the IH bolts was loose

I got it all back together and fired her up. SES light came on, and the scanner said, "Hey, stupid! you forgot to connect the MAT sensor!""

I connected the MAT sensor and fired her up again. Aside from a fast idle, it now runs smooth as silk. And, when I "blip" the throttle, there is no stumble - it revs smartly and cleanly. WooHoo!

Well, the "acid test" will have to wait till I can put it on the road. But, things look very encouraging. Oh, and y'all were right 'bout pulling the plenum: It's a piece of cake.

Stay tuned!

P.

phrogs · 02-10-2008

I am having a wierd idle it surges after the car is warm and I can not figure it out, I was just under the plenum and couldnt find any vacum leaks.

hope yours works out!

tomtom72 · 02-10-2008

sweet deal!

Jagdpanzer · 02-10-2008

Quote:

Originally Posted by Paul Workman

-MICE had been nesting in the valley of my LT5 and they made a mess of the coil pack area.

Hey they thought it was another Chevy mouse motor and felt right at home.

32valvZ · 02-10-2008

Great news Paul...sounds like you got it licked!! I hope my results are the same when I'm done. I had a mouse make a home in my valley as well. All he managed to get to was the bif cable on the starter and the smaller purple wire that goes to the starter.....pretty much just chewed through the insulation.

bradslt5 · 02-10-2008

i used to have the mice problem also . an old hotrodder gave me a yip thats really worked , keeps the inside of the car smelling nice also . take a bar of Irish spring and cut it in 8ths and put them in the interior 1each under the insirts of the back 2 stage pods 2 each under the seats and one each under the carpet above the throttle area and in the passenger area. the other 2 iput on the plenum after i am done driving . i thought the guy was goofy , but ya know what it WORKS

Ccmano · 02-10-2008

Quote:

Originally Posted by Paul Workman

-a vacume line that connects to the underside of the TB's chin that was NOT connected.
It's a piece of cake.

Good work! Exactly what we told you Pizza night...

Bet you can't wait to take her out on the road!

Hans

Paul Workman · 02-10-2008

Quote:

Originally Posted by bradslt5

i used to have the mice problem also . an old hotrodder gave me a yip thats really worked , keeps the inside of the car smelling nice also . take a bar of Irish spring and cut it in 8ths and put them in the interior 1each under the insirts of the back 2 stage pods 2 each under the seats and one each under the carpet above the throttle area and in the passenger area. the other 2 iput on the plenum after i am done driving . i thought the guy was goofy , but ya know what it WORKS

Kewal!! I'll add Irish Spring to the list:
Bounce sheets worked in the past, but not 100%
Peppermint oil works as well (and I like the smell better!)
Heard about Irish S. but never tried it. But, hey! IF it works and is cheap as a bar of soap...Nutting to loose, right!

Paul Workman · 02-10-2008

Yep! Can't wait!!

P.

02-10-2008	#1
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Stumbling issue gone??? Well, I spent the better part of today pulling the plenum and replacing the coils and wires. Among other things, I discovered- -a vacume line that connects to the underside of the TB's chin that was NOT connected. -MICE had been nesting in the valley of my LT5 and they made a mess of the coil pack area. -one plug wire had what looks like a nick which would be introduced by an rodent's bite. The rest looked dirty, but other than than they seemed to be free from more bites. (So, I'll clean 'em and keep 'em 'case someone wants 'em later.) -the torque on the IH bolts was loose I got it all back together and fired her up. SES light came on, and the scanner said, "Hey, stupid! you forgot to connect the MAT sensor!"" I connected the MAT sensor and fired her up again. Aside from a fast idle, it now runs smooth as silk. And, when I "blip" the throttle, there is no stumble - it revs smartly and cleanly. WooHoo! Well, the "acid test" will have to wait till I can put it on the road. But, things look very encouraging. Oh, and y'all were right 'bout pulling the plenum: It's a piece of cake. Stay tuned! P.

02-10-2008	#2
phrogs Join Date: Jul 2004 Location: Kalamazoo MI Posts: 1,753	Re: Stumbling issue gone??? I am having a wierd idle it surges after the car is warm and I can not figure it out, I was just under the plenum and couldnt find any vacum leaks. hope yours works out! __________________ JOHNNY P Currently own 90 ZR-1 #845 DRM 500 engine package 90 #226 Parts car Hit me up if you need anything.

02-10-2008	#3
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: Stumbling issue gone??? sweet deal! __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

02-10-2008	#5
32valvZ Join Date: Nov 2007 Location: Sunshine State Posts: 1,071	Re: Stumbling issue gone??? Great news Paul...sounds like you got it licked!! I hope my results are the same when I'm done. I had a mouse make a home in my valley as well. All he managed to get to was the bif cable on the starter and the smaller purple wire that goes to the starter.....pretty much just chewed through the insulation. __________________ [B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B]

02-10-2008	#6
bradslt5 Join Date: Oct 2007 Location: lone pine and mammoth lakes ca. Posts: 544	Re: Stumbling issue gone??? i used to have the mice problem also . an old hotrodder gave me a yip thats really worked , keeps the inside of the car smelling nice also . take a bar of Irish spring and cut it in 8ths and put them in the interior 1each under the insirts of the back 2 stage pods 2 each under the seats and one each under the carpet above the throttle area and in the passenger area. the other 2 iput on the plenum after i am done driving . i thought the guy was goofy , but ya know what it WORKS

02-10-2008	#9
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,493	Re: Stumbling issue gone??? Yep! Can't wait!! P.