07-06-2020 | #1 |
Join Date: Dec 2005
Location: Delanson, NY
Posts: 914
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1990 first drive this season
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) |
07-07-2020 | #2 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,162
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Re: 1990 first drive this season
Old gas? or all fresh?
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
07-07-2020 | #3 |
Join Date: Dec 2005
Location: Delanson, NY
Posts: 914
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Re: 1990 first drive this season
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?
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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) |
07-07-2020 | #4 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,162
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Re: 1990 first drive this season
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?
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
07-07-2020 | #5 | |
Join Date: Dec 2005
Location: Delanson, NY
Posts: 914
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Re: 1990 first drive this season
Quote:
Thanks again.
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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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07-07-2020 | #6 |
Join Date: Jun 2020
Location: Michigan
Posts: 2
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Re: 1990 first drive this season
I had the same problem with my 90' Check the throttle position sensor.
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07-08-2020 | #7 | |
Join Date: Dec 2005
Location: Delanson, NY
Posts: 914
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Re: 1990 first drive this season
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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07-08-2020 | #8 |
Join Date: Sep 2016
Location: Ocala, FL
Posts: 894
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Re: 1990 first drive this season
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. |
07-09-2020 | #9 |
Join Date: Feb 2011
Location: Clayton, North Carolina
Posts: 1,133
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Re: 1990 first drive this season
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Lou[COLOR="Red"][B][SIZE="4"][/SIZE][/B][/COLOR] |
07-10-2020 | #10 | |
Join Date: Dec 2005
Location: Delanson, NY
Posts: 914
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Re: 1990 first drive this season
Quote:
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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