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#1 |
![]() Join Date: Dec 2005
Location: Delanson, NY
Posts: 911
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Finally was able to take my 1990 out this summer for a drive. I noticed at lower RPMs (idle-2000) when you apply the gas petal it hesitates and stumbles then catches. Replaced injectors with FICs about 3 -4 years ago. I only put about 3-4000 miles a year on the car. Does this sound like plug wires or plugs? No codes. Could the injectors go out in this short of time? Is there something I am not thinking of??
Thanks in advance for your thoughts.
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1968 convertible Lemans Blue, 1986 coupe Medium Blue NCRS Top Flight (sold), 1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold), 1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018, 2003 Anniversary Red Convertible (sold) |
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#2 |
![]() Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,153
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Old gas? or all fresh?
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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#3 |
![]() Join Date: Dec 2005
Location: Delanson, NY
Posts: 911
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I filled the tank at the end of last season with premium and added fuel stabilizer per directions. I thought I had read a post that the tank should be full for winter storage? Could this damage the injectors?
__________________
1968 convertible Lemans Blue, 1986 coupe Medium Blue NCRS Top Flight (sold), 1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold), 1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018, 2003 Anniversary Red Convertible (sold) |
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#4 |
![]() Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,153
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no, I always store with full tank, just trying to get a gauge for the fuel.. I got a tank of bad gas (from BP) recently.. first time I every had an issue..
No codes.. hmmm, you have a scanner to see what the car is doing?
__________________
1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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#5 | |
![]() Join Date: Dec 2005
Location: Delanson, NY
Posts: 911
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Thanks again.
__________________
1968 convertible Lemans Blue, 1986 coupe Medium Blue NCRS Top Flight (sold), 1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold), 1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018, 2003 Anniversary Red Convertible (sold) |
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#6 |
Join Date: Jun 2020
Location: Michigan
Posts: 2
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I had the same problem with my 90' Check the throttle position sensor.
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#7 | |
![]() Join Date: Dec 2005
Location: Delanson, NY
Posts: 911
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![]() Quote:
Thanks
__________________
1968 convertible Lemans Blue, 1986 coupe Medium Blue NCRS Top Flight (sold), 1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold), 1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018, 2003 Anniversary Red Convertible (sold) |
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#8 |
![]() Join Date: Sep 2016
Location: Ocala, FL
Posts: 889
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Time for Italian Tune Up?
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Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much. |
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#9 |
![]() Join Date: Feb 2011
Location: Clayton, North Carolina
Posts: 1,133
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__________________
Lou[COLOR="Red"][B][SIZE="4"][/SIZE][/B][/COLOR] |
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#10 | |
![]() Join Date: Dec 2005
Location: Delanson, NY
Posts: 911
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He is also lending me his fuel pump jumper to see if the primary pump is going. I missed out on the jumper buy. Soon as it comes by snail mail I am going to check that and then also get a loaner pressure gauge to check that. If fuel pump is ruled out then I might try your advice.
__________________
1968 convertible Lemans Blue, 1986 coupe Medium Blue NCRS Top Flight (sold), 1990 ZR1 #2529 Red NCRS Regional and National Top Flight (sold), 1990 ZR1 #2124 Charcoal Metallic NCRS Top Flight 2010 & 2018, 2003 Anniversary Red Convertible (sold) |
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