Exhaust changes causes problems - Page 11 - ZR-1 Net Registry Forums

rogerzr1 · 02-26-2008

I talked withy Jeff and looks like I will hopefully get him to look at the car while he is in Birmingham. As I told him, I have never worked on cars before. Looks like I picked a good vehicle to start with.

Hopefully I will have some good news after next weekend.

I appreciate everyones help!!!

Seems like everyone on the Registry is willing to help a brother of the beast out.

I am hoping soon to not be sooooo much trouble.

blackjack · 02-27-2008

sounds like bad spark plug to me
bj
91/1735

rogerzr1 · 02-27-2008

Quote:

Originally Posted by blackjack

sounds like bad spark plug to me
bj
91/1735

I sure hope it is something that simple.

blackjack · 03-01-2008

happened to me(not with the z)....your favorite mechanic drops a plug on the floor,and still puts it in

bj

Demps · 03-01-2008

One more try...what are the plugs gapped at?

rogerzr1 · 03-01-2008

Quote:

Originally Posted by Demps

One more try...what are the plugs gapped at?

I am sad to say I don't know. They are the Ac Delco plugs. The mechanic that put the in said they were the correct ones for the car, but right now that doesn't mean much to me.

Hope to find some answers next Friday.

blackjack · 03-01-2008

gm recommends .035'' for 90-92,and .050'' for 93-95...generally speaking,a smaller gap will give you easier starting while a wider gap is better for high speed...i would start with .035'',and go from there,keeping in mind that too wide a gap can cause misfiring,,,mine are set at .040''
91/1735

Pete · 03-01-2008

Spark plugs are a cheap place to start.

I had a bad spark plug on the Z loosing pressure.
I started with the cheapest parts spark plugs.

And make sure you gap then .032- .035 i don't care what GM reccommands.

Pete

karterdon · 03-01-2008

One quick thing to look at - The vacuum hoses on the back of the plennum and on the fuel pressure regulator. If you had a slight back fire - they may have come off. Might contribute to your fuel issue.

Good Luck

D.Y. 91-#267

rogerzr1 · 03-09-2008

Issue resolved!!!!!

ALL HAIL JEFFVETTE.

I went to Birmingham to the vette gathering. Jeff was there helping Fred with his Zo6 race car and for the vette get together. After a long day driving the Zo6 on the track, Jeff took a couple of hours to help me with my car(I know he was tired). We were at Chris's house. (aka. Corvette95-Talk about a garage and car room. I hope Chris will post some pics of his garage, paint shop, basement room, and attick. Amazing). He was nice enough to allow us the use of his great garage. Anyway, long story short, problem turned out to be coil packs. Once again Jeff had anticipated this and brought the materials needed.

I have had the car since August 2007. Last night on my way home is the first time the car drove like it was supposed to drive. Man what a feeling!!!

I took a number of photos at the race track where Fred Turner and Jeff were taking turns in the zo6. I will post some when I figure out how to do it.

Again let me thank everyone for their input and help.

Jeff you are the man!!!!!

02-26-2008	#101
rogerzr1 Join Date: Sep 2007 Location: Georgia Posts: 231	Re: Exhaust changes causes problems I talked withy Jeff and looks like I will hopefully get him to look at the car while he is in Birmingham. As I told him, I have never worked on cars before. Looks like I picked a good vehicle to start with. Hopefully I will have some good news after next weekend. I appreciate everyones help!!! Seems like everyone on the Registry is willing to help a brother of the beast out. I am hoping soon to not be sooooo much trouble. __________________ Roger Miller 91 ZR-1 #391

02-27-2008	#102
blackjack Join Date: Aug 2005 Location: north of montreal Posts: 512	Re: Exhaust changes causes problems sounds like bad spark plug to me bj 91/1735

03-01-2008	#104
blackjack Join Date: Aug 2005 Location: north of montreal Posts: 512	Re: Exhaust changes causes problems happened to me(not with the z)....your favorite mechanic drops a plug on the floor,and still puts it in bj

03-01-2008	#105
Demps Join Date: Jan 2006 Location: Niceville Posts: 997	Re: Exhaust changes causes problems One more try...what are the plugs gapped at?

03-01-2008	#107
blackjack Join Date: Aug 2005 Location: north of montreal Posts: 512	Re: Exhaust changes causes problems gm recommends .035'' for 90-92,and .050'' for 93-95...generally speaking,a smaller gap will give you easier starting while a wider gap is better for high speed...i would start with .035'',and go from there,keeping in mind that too wide a gap can cause misfiring,,,mine are set at .040'' 91/1735

03-01-2008	#108
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,680	Re: Exhaust changes causes problems Spark plugs are a cheap place to start. I had a bad spark plug on the Z loosing pressure. I started with the cheapest parts spark plugs. And make sure you gap then .032- .035 i don't care what GM reccommands. Pete __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage

03-01-2008	#109
karterdon Join Date: Jan 2008 Location: Antioch, Illinois Posts: 129	Re: Exhaust changes causes problems One quick thing to look at - The vacuum hoses on the back of the plennum and on the fuel pressure regulator. If you had a slight back fire - they may have come off. Might contribute to your fuel issue. Good Luck D.Y. 91-#267

03-09-2008	#110
rogerzr1 Join Date: Sep 2007 Location: Georgia Posts: 231	Re: Exhaust changes causes problems Issue resolved!!!!! ALL HAIL JEFFVETTE. I went to Birmingham to the vette gathering. Jeff was there helping Fred with his Zo6 race car and for the vette get together. After a long day driving the Zo6 on the track, Jeff took a couple of hours to help me with my car(I know he was tired). We were at Chris's house. (aka. Corvette95-Talk about a garage and car room. I hope Chris will post some pics of his garage, paint shop, basement room, and attick. Amazing). He was nice enough to allow us the use of his great garage. Anyway, long story short, problem turned out to be coil packs. Once again Jeff had anticipated this and brought the materials needed. I have had the car since August 2007. Last night on my way home is the first time the car drove like it was supposed to drive. Man what a feeling!!! I took a number of photos at the race track where Fred Turner and Jeff were taking turns in the zo6. I will post some when I figure out how to do it. Again let me thank everyone for their input and help. Jeff you are the man!!!!! __________________ Roger Miller 91 ZR-1 #391