Back to Topic Listing Switch to

[ Post New Message | Reply | Edit Profile | Register | Search | Current Connections | Message Board FAQ | Lost Password? ]

 << Previous Thread - Car wont start, any ideas   Next Thread - looking for 400 rwhp cam only >> 
99 Z28 runs rough over 2300rpm

Posted By: stockcarfan24 On: 11-08-2009 @ 16:51:02         Reply | Edit
My 99Z28 starts and idles fine but cuts out over 2300 to 2500 rpm and over. If you drive normal it runs okay but if you try to accelerate fast it falls on its face. Car has 75000 miles, stock with flowmaster exhaust(for now).Need exhaust soon. No check engine light. Fuel pressure about 57 lbs.
Posted By: TransAm64 On: 11-12-2009 @ 16:04:34     Reply | Top | Edit
This may not apply here but it's worth a shot. I had a similar problem with my car. It acted like it was running out of fuel @ around 3500-4000 under hard acceleration. I tinkerd around for about a week before I just looked it over and found that a piece of doublesided foam that was sealing my airbox had gotten sucked onto the screen of the MAF. I cleaned the screen and the problem was gone.
--
00' Trans Am convertible, M6 ,K&N, Edelbrock exhaust. SLP Loudmouth coming soon.

Posted By: stockcarfan24 On: 11-16-2009 @ 19:18:24     Reply | Top | Edit
I went out of town for the weekend and the car started running worse so wife took it to the shop without calling me. They told her they thought it was bad mass air sensor and she told them to fix it. Sucks that I'm paying someone to fix something so easy. Will let you know for sure after sensor comes in.
Posted By: BadgeZ28 On: 12-18-2009 @ 14:02:03     Reply | Top | Edit
most auto parts stores have a scanning tool and will scan your pcm for free. Idle fuel pressure might not show you what is happening off idle.
Posted By: Reaper  Yearly Donor since 01-28-2008 On: 12-20-2009 @ 13:14:27     Reply | Top | Edit
MAF is what i was going to say.. sorry its too late
--

Rick Speed's Performance...1-888-891-2401.. specializing in building F-body's with attitude
UMI Performance dealer... http://www.UMIPerformance.com 10% off special
Procharger Dealer... ask for specials
Posted By: stockcarfan24 On: 03-03-2010 @ 15:23:56     Reply | Top | Edit
Sorry so late responding, was bad Mass air sensor.
 << Previous Thread - Car wont start, any ideas   Next Thread - looking for 400 rwhp cam only >> 

Reply to this Message
UserName: [ Not a member? Register here! ]
Password: [ Edit Profile ] [ Logout ]
Message:

Check the box to be notified via e-mail when a reply is posted to this thread. Members who are logged in can enable the notify option without posting a message.
Use Signature:

Back To Topic List
If it looks (c) it probably is - All work done by James Hogan