ZR-1 Net Registry Forums  

Go Back   ZR-1 Net Registry Forums > C4 ZR-1 > C4 ZR-1 Technical Postings

Reply
 
Thread Tools Display Modes
Old 01-18-2008   #61
rogerzr1
 
rogerzr1's Avatar
 
Join Date: Sep 2007
Location: Georgia
Posts: 231
Default Re: Exhaust changes causes problems

Quote:
Originally Posted by A26B
Roger,

Data indicates the problem is probably not with the fuel pumps.

Few questions:
1. Did you ever change the fuel filter?
2. Did you ever experience any of these symptoms, before installing the new exhaust system?
3. Have you pulled the stored codes?
4. Are you getting any warning lights on the display?
1. The fuel filter was changed back in August.
2. There were a couple of times that the car did hesitate, but I just thought it was the nature of the beast. One thing I thought of is that the car is more prone to act up if there is another person in the car with me. I can't imagine another 180lbs would cause any problems. Just trying to give all the info I have.
3. I don't have a scan tool.
4. I have not had any lights come on except the service ride control. It comes on if I let the car idle for a while, but goes away when I start driving.

I am going to show my extreme ignorance now - I paid close attention when I started the car the last time. There was a vacume type sound and I felt a lot of air under the left coolant conector. After a couple of minutes the sound went away and the air flow did too. This is probably normal and I should know it, but I just thought I would mention it.

Again, let me thank all of you who are trying to help. I really appreciate it.
__________________
Roger Miller
91 ZR-1 #391
rogerzr1 is offline   Reply With Quote
Old 01-19-2008   #62
Scottys72
 
Scottys72's Avatar
 
Join Date: Dec 2007
Location: Ottawa ON
Posts: 15
Default Re: Exhaust changes causes problems

Hi Roger - I found this link for removing the plenum in another post:

http://www.bcvettes.org/

Look under "How To"

Good luck

Scott
Scottys72 is offline   Reply With Quote
Old 01-19-2008   #63
Jeffvette
Guest
 
Posts: n/a
Default Re: Exhaust changes causes problems

Quote:
Originally Posted by rogerzr1
I am going to show my extreme ignorance now - I paid close attention when I started the car the last time. There was a vacume type sound and I felt a lot of air under the left coolant conector. After a couple of minutes the sound went away and the air flow did too. This is probably normal and I should know it, but I just thought I would mention it.

Again, let me thank all of you who are trying to help. I really appreciate it.
The vacuum noise is the air injection system. I would not expect you to be feeling any air other than what is coming off the serp belt system and power steering pulley right in that area.
  Reply With Quote
Old 01-19-2008   #64
rogerzr1
 
rogerzr1's Avatar
 
Join Date: Sep 2007
Location: Georgia
Posts: 231
Default Re: Exhaust changes causes problems

Quote:
Originally Posted by Jeffvette
The vacuum noise is the air injection system. I would not expect you to be feeling any air other than what is coming off the serp belt system and power steering pulley right in that area.
If the air I was feeling is coming from the serp belt or power steering pulley would it go away after a couple of minutes or would it be there the whole time the engine is on?

It is a very noticable amount of air flow.
__________________
Roger Miller
91 ZR-1 #391
rogerzr1 is offline   Reply With Quote
Old 01-19-2008   #65
rogerzr1
 
rogerzr1's Avatar
 
Join Date: Sep 2007
Location: Georgia
Posts: 231
Default Re: Exhaust changes causes problems

Quote:
Originally Posted by Scottys72
Hi Roger - I found this link for removing the plenum in another post:

http://www.bcvettes.org/

Look under "How To"

Good luck

Scott
Thanks Scott. I looked it over. I don't feel quite as scared as I was before. I think with a step by step guide I can pull it off. The only problem is I don't really know what I am looking for under the plenum.

I drove the car this evening and actually had it backfire on me. I drove it around for a while to let it warm up and it drove fine. After it warmed up I gave it a few WOT. A couple of times it drove great. One time it backfired in 1st at 5500 rpms, then drove like it was turbocharged through 3rd. I am so confused.
__________________
Roger Miller
91 ZR-1 #391
rogerzr1 is offline   Reply With Quote
Old 01-19-2008   #66
Jeffvette
Guest
 
Posts: n/a
Default Re: Exhaust changes causes problems

Quote:
Originally Posted by rogerzr1
If the air I was feeling is coming from the serp belt or power steering pulley would it go away after a couple of minutes or would it be there the whole time the engine is on?

It is a very noticable amount of air flow.
It should not go away if it's coming from the belt and pulley. I'll give you a call in a few mintures Roger.
  Reply With Quote
Old 01-19-2008   #67
rogerzr1
 
rogerzr1's Avatar
 
Join Date: Sep 2007
Location: Georgia
Posts: 231
Default Re: Exhaust changes causes problems

Quote:
Originally Posted by Jeffvette
It should not go away if it's coming from the belt and pulley. I'll give you a call in a few mintures Roger.
Jeff,

Please give me a call when you get a chance. Do you still have my number?
__________________
Roger Miller
91 ZR-1 #391
rogerzr1 is offline   Reply With Quote
Old 01-20-2008   #68
Polo-1
 
Join Date: Sep 2005
Location: Washington
Posts: 955
Default Re: Exhaust changes causes problems

Sounds a lot like my Z.

Replace the 02 sensors. Easy and cheap to do. Also check the TPS with VOM.
Polo-1 is offline   Reply With Quote
Old 01-20-2008   #69
rogerzr1
 
rogerzr1's Avatar
 
Join Date: Sep 2007
Location: Georgia
Posts: 231
Default Re: Exhaust changes causes problems

Quote:
Originally Posted by Polo-1
Sounds a lot like my Z.

Replace the 02 sensors. Easy and cheap to do. Also check the TPS with VOM.
My Helms manual should be here next week. I hope it will describe how to do what you have suggested.

I plan on taking the plenum off and will more than likely change the plugs and the plug wires. I have a set of the AC Delco plug wires. Should I go with the NGK plugs?

Another question: Any chance my ECM is the problem. Seems like I read before that a couple of guys had a simular problem that replacing the ECM fixed.
__________________
Roger Miller
91 ZR-1 #391
rogerzr1 is offline   Reply With Quote
Old 01-20-2008   #70
rogerzr1
 
rogerzr1's Avatar
 
Join Date: Sep 2007
Location: Georgia
Posts: 231
Default Re: Exhaust changes causes problems

Quote:
Originally Posted by Polo-1
Sounds a lot like my Z.

Replace the 02 sensors. Easy and cheap to do. Also check the TPS with VOM.
My Helms manual should be here next week. I hope it will describe how to do what you have suggested.

I plan on taking the plenum off and will more than likely change the plugs and the plug wires. I have a set of the AC Delco plug wires. Should I go with the NGK plugs?

Another question: Any chance my ECM is the problem. Seems like I read before that a couple of guys had a simular problem that replacing the ECM fixed.
__________________
Roger Miller
91 ZR-1 #391
rogerzr1 is offline   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:59 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright ZR-1 Net Registry 2020