Re: Sniper EFI bad injector
[Re: TJP]
#2933985
06/16/21 04:37 PM
06/16/21 04:37 PM
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Joined: Jan 2005
Posts: 4,446 Michigan
MarkZ
OP
Worthy
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OP
Worthy
Joined: Jan 2005
Posts: 4,446
Michigan
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Alright, spoke too soon I guess. That hole wasn't spewing gas because the injector wasn't firing. The first time I put it back together one of the pins didn't line up properly. The plug itself is just a couple of pins free floating - no molded plastic to keep them centered. After assembling it a second time it started spewing gas out the barrel that had the original problem. This is after swapping the injectors front to back. Has to be electrical, but I couldn't find anything glaringly wrong with it. Back to Holley it goes. Already have a return label. Thank you everyone for your help.
1987 Fifth Avenue - 512/518/D60
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Re: Sniper EFI bad injector
[Re: MarkZ]
#2934064
06/16/21 09:08 PM
06/16/21 09:08 PM
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Joined: Jan 2003
Posts: 15,462 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,462
Omaha Ne
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Alright, spoke too soon I guess. That hole wasn't spewing gas because the injector wasn't firing. The first time I put it back together one of the pins didn't line up properly. The plug itself is just a couple of pins free floating - no molded plastic to keep them centered. After assembling it a second time it started spewing gas out the barrel that had the original problem. This is after swapping the injectors front to back. Has to be electrical, but I couldn't find anything glaringly wrong with it. Back to Holley it goes. Already have a return label. Thank you everyone for your help. So I'm a bit confused ( not unusual LOL) After assembling it a second time it started spewing gas out the barrel that had the original problem Is that with another injector or the same one? I assuming a different Injector as you're now suspecting an electrical issue. SNIPER earlier mentioned he believes they are fired off a ground signal. If so, just out of curiosity, I might try to disconnect the signal wire at the ECU to see if the injector shuts off. That would confirm 2 things. It is the ECU, and that you do not have a pinched wire or other erroneous problem.
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Re: Sniper EFI bad injector
[Re: MarkZ]
#2934180
06/17/21 10:24 AM
06/17/21 10:24 AM
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Joined: Apr 2009
Posts: 3,421 Toronto
mshred
master
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master
Joined: Apr 2009
Posts: 3,421
Toronto
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I've got about $1500 tied up into mine between the pump, unit and fittings. It's been on the car for three years now, so well outside warranty. What little I've been able to find it looks like the injectors are proprietary and Holley won't sell them separate. I really don't want to send this back to them for service. Car has been down long enough. Was this the first time firing up in the 3 years you have had it?
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Re: Sniper EFI bad injector
[Re: mshred]
#2934246
06/17/21 01:06 PM
06/17/21 01:06 PM
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Joined: Jan 2005
Posts: 4,446 Michigan
MarkZ
OP
Worthy
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OP
Worthy
Joined: Jan 2005
Posts: 4,446
Michigan
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I've got about $1500 tied up into mine between the pump, unit and fittings. It's been on the car for three years now, so well outside warranty. What little I've been able to find it looks like the injectors are proprietary and Holley won't sell them separate. I really don't want to send this back to them for service. Car has been down long enough. Was this the first time firing up in the 3 years you have had it? No, it was running in the fall. Originally took it apart to swap valve springs as the builder had the wrong ones in place. Sniper unit sat on the top of the car over the winter.
1987 Fifth Avenue - 512/518/D60
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Re: Sniper EFI bad injector
[Re: TJP]
#2934249
06/17/21 01:13 PM
06/17/21 01:13 PM
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Joined: Jan 2005
Posts: 4,446 Michigan
MarkZ
OP
Worthy
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OP
Worthy
Joined: Jan 2005
Posts: 4,446
Michigan
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Alright, spoke too soon I guess. That hole wasn't spewing gas because the injector wasn't firing. The first time I put it back together one of the pins didn't line up properly. The plug itself is just a couple of pins free floating - no molded plastic to keep them centered. After assembling it a second time it started spewing gas out the barrel that had the original problem. This is after swapping the injectors front to back. Has to be electrical, but I couldn't find anything glaringly wrong with it. Back to Holley it goes. Already have a return label. Thank you everyone for your help. So I'm a bit confused ( not unusual LOL) After assembling it a second time it started spewing gas out the barrel that had the original problem Is that with another injector or the same one? I assuming a different Injector as you're now suspecting an electrical issue. SNIPER earlier mentioned he believes they are fired off a ground signal. If so, just out of curiosity, I might try to disconnect the signal wire at the ECU to see if the injector shuts off. That would confirm 2 things. It is the ECU, and that you do not have a pinched wire or other erroneous problem. Had the original problem of the rear passenger barrel blowing fuel all over the place. Swapped injectors front to back on Andy's suggestion and observed it wasn't doing that anymore. Upon further inspection though I noticed the passenger rear injector wasn't firing at all. Turned out I didn't plug it in correctly (pins float and aren't held in place in a molded plug). After I corrected that mistake the original problem came back with the passenger rear barrel blowing fuel again. This was with the injectors being swapped, so I can only conclude now it's an electrical fault since the issue didn't follow the injector.
1987 Fifth Avenue - 512/518/D60
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Re: Sniper EFI bad injector
[Re: TJP]
#2938959
07/02/21 09:38 AM
07/02/21 09:38 AM
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Joined: Jan 2005
Posts: 4,446 Michigan
MarkZ
OP
Worthy
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OP
Worthy
Joined: Jan 2005
Posts: 4,446
Michigan
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Just an update. Holley called yesterday and repaired the unit. Faulty injector driver. Cost me $250 seeing as how it was out of warranty. I'm happy though. Only took them a week to turn it around and they covered shipping there and back.
1987 Fifth Avenue - 512/518/D60
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Re: Sniper EFI bad injector
[Re: BDW]
#2939093
07/02/21 06:27 PM
07/02/21 06:27 PM
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Joined: Jan 2005
Posts: 4,446 Michigan
MarkZ
OP
Worthy
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OP
Worthy
Joined: Jan 2005
Posts: 4,446
Michigan
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Glad you got it fixed. Price seems a little high? How old is the system, and what does a new complete Sniper cost? New unit is $1k. Mine is three years old. The tech said they replaced the logic board too.
1987 Fifth Avenue - 512/518/D60
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