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#11 |
![]() Join Date: Feb 2012
Location: Angola, NY
Posts: 8
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Okay Tom,
Have added the MAP and MAP hose to my "to do list." Hopefully have good news to report mid-May. Thanks for all your help, Dennis |
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#12 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Couple of things:
1. How long has it been since fuel filter replaced? 2. Check TPS voltage at ignition ON. |
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#13 | |
![]() Join Date: Aug 2006
Location: McLean, VA
Posts: 3,712
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MAP sensor hose between the sensor and the back of the plenum is a hard plastic piece w/ rubber fitting at both ends. Mine were replaced with a soft hose. With age this hose got softer and at high vacuum during decelleration the hose would collapse cutting off vacuum reading for the MAP sensor. Trying to accelerate at certain condition would make the car buck. Check and make sure you have a hard plastic hose. |
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#14 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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#15 | |
![]() Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,645
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![]() I have a bad habit of projecting my P/M program onto every "help, having issues" thread I answer so I leave a lot of stuff out of my responses because those things are parts I consider 'consumables' and get r&r'ed every yr on my Z. My bad! ![]() ![]() Tom
__________________
1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
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#16 |
![]() Join Date: Feb 2012
Location: Angola, NY
Posts: 8
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Tom, Dominic and Yun,
Hey Guys, hate to admit it but when Tom mentioned the MAP hose it struck a nerve. When I bought the car and was battling high idle I replaced all the vacuum hoses and in stalled clamps. Yes, the MAP hose was replaced with rubber hose because the rubber fittings on the ends of the hard plastic tube were deterioated and falling off. So I did the exactly the wrong thing as confirmed by Yun. I ordered a new correct hose from White Racing Products (not inexpensive). Can't wait to get that hose on and if it's not the final answer will proceed next to fuel starvation. I did change the fuel filter a couple years ago. With your guys help I will have the beast running like it should. Thanks, Dennis |
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#17 |
![]() Join Date: Feb 2012
Location: Angola, NY
Posts: 8
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Hi Tom, Dominic and Yun,
You guys are awsome. With all the warm weather in the Buffalo area I couldn't wait until I got back from Florida to install the new MAP pipe. Guess what, it was the dreaded MAP vaccum hose that I incorrectly installed just as Yun said and Tom suspected. Wow, the Z is now a pleasure to drive without the threat of an idle stall and accelerates smoothly in any gear with no bucking. I will also check out the fuel pumps and codes when I get back home. I can't thank you guys enough. Stay tuned you are now my go to guys for any future problems. Dennis |
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#18 |
![]() Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,645
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__________________
1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
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#19 | |
![]() Join Date: Aug 2006
Location: McLean, VA
Posts: 3,712
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