t-type&Z06CRAZE
New Member
- Joined
- Apr 13, 2006
We got the car out from it being stored up for the winter, checked all the fluids and charged the battery up. Ready to go right? LOL - Well we started the little beast up and needless to say it was skipping running rough and smoking from all available holes possible.
We have sense - changed the spark plugs, reinstalling the hot plugs as we always do, chaged over the valve cover gaskets as they were leaking last year, visually inspected every thing else, all seems fine. She then is started up again, fired right up, no smoke at all and runs fairly smooth, has a slight skip or hesitation at idle...UNTIL.. you get out on the road with her. Once heated to neccessary temp, we then tested the turbo - keep in mind scantech - mass air flow is reading 240 - 250 0n cruise and turbo is reading 0.0, we begin to gain speed and try and build boost by going through the motions, NOT HAPPENING! While trying to build boost scan tech read - Mass airflow dropped to 119, 130, 140's - turbo still showing zero!
To troubleshoot the "no spool" we have:
•Removed inlet tube into the turbo to check turbine, moves fine with no wobble or no rubbing the housing - seems fine - CHECK!
•Checked the waste gate and bar for any movement or anything out of the ordinary - seems fine!
•Checked the Mass Air Flow Sensor - all wiring and connectors look fine, while car was running keep in mind oil pressure showed 65 at all times, normally it shows 40 until you get on it. We unplugged the mass air flow while the car was running, no change in the way it was running, except the oil pressure dropped down to normal(?), engine idled up breifly and then dropped back down, and the check engine light comes on! My thinking is....the MAF sensor is either contaminated and needs to be cleaned OR it is getting ready to go bad. When unplugged the scan tech readings didnt even change any.
Has anyone had these problems or have any other suggestions that we could test? We have not changed over the plug wires, they are rather old but seem fine to the eye, but those wires have been through about 7 racing seasons I know of.
Any suggestions would be GREAT!
We have sense - changed the spark plugs, reinstalling the hot plugs as we always do, chaged over the valve cover gaskets as they were leaking last year, visually inspected every thing else, all seems fine. She then is started up again, fired right up, no smoke at all and runs fairly smooth, has a slight skip or hesitation at idle...UNTIL.. you get out on the road with her. Once heated to neccessary temp, we then tested the turbo - keep in mind scantech - mass air flow is reading 240 - 250 0n cruise and turbo is reading 0.0, we begin to gain speed and try and build boost by going through the motions, NOT HAPPENING! While trying to build boost scan tech read - Mass airflow dropped to 119, 130, 140's - turbo still showing zero!
To troubleshoot the "no spool" we have:
•Removed inlet tube into the turbo to check turbine, moves fine with no wobble or no rubbing the housing - seems fine - CHECK!
•Checked the waste gate and bar for any movement or anything out of the ordinary - seems fine!
•Checked the Mass Air Flow Sensor - all wiring and connectors look fine, while car was running keep in mind oil pressure showed 65 at all times, normally it shows 40 until you get on it. We unplugged the mass air flow while the car was running, no change in the way it was running, except the oil pressure dropped down to normal(?), engine idled up breifly and then dropped back down, and the check engine light comes on! My thinking is....the MAF sensor is either contaminated and needs to be cleaned OR it is getting ready to go bad. When unplugged the scan tech readings didnt even change any.
Has anyone had these problems or have any other suggestions that we could test? We have not changed over the plug wires, they are rather old but seem fine to the eye, but those wires have been through about 7 racing seasons I know of.
Any suggestions would be GREAT!
