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Non SVX - Why would a fuel injector not inject fuel?
My friend bought a 91 Chevy Tracker which will now not start. I've gone through the usual stuff. There is spark, fuel pump runs, fuel is flowing well at the fuel rail, timing is good, and it will fire if I'm spraying gas/starter fluid directly into the intake. It has single point injection inside the throttle body, so we pulled the injector to look for anything obvious, but all looks good from a visual inspection.
Because it's a single point injector, it wouldn't pulse like ours, right? I would expect it just sprays more or less fuel constantly depending on throttle/engine load. Apparently (this is coming from people who don't know much about cars and can't really give me a technical description) it was running poorly and the gas pedal had to be pumped to make it run properly. *shrug* Thoughts?
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Chris 92 Ebony Mica LS-L "A Rolling Restoration": 223,250 KM - Sleeping 2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos 2008 Subaru Legacy Spec B - Diamond Grey Metallic - Sold 2020 Ram 1500 Longhorn - Red Pearl |
#2
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Re: Non SVX - Why would a fuel injector not inject fuel?
Check the injector for continuity with a tester (ohmeter?), the mono point injector should have around 3-10 K ohms.
If there is no continuity, (o ohms) then the injector should be replaced.
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95´ Subaru SVX EURO 85' Mercedes 190 2.3-16 86' Mercedes 190E 70' Olds Toronado 98' Renault Chamade 82' Honda Prelude 79' Honda Accord awaiting restomod. 69' Mustang Hardtop 67' Jeep Ford Willys awaiting restoration. 67' IKA Torino Coupe 74' Renault Torino Coupe |
#3
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Re: Non SVX - Why would a fuel injector not inject fuel?
I'll check that when I see my friend next. I'm really hoping not to replace the injector, as they run in the $550 neighbourhood.
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Chris 92 Ebony Mica LS-L "A Rolling Restoration": 223,250 KM - Sleeping 2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos 2008 Subaru Legacy Spec B - Diamond Grey Metallic - Sold 2020 Ram 1500 Longhorn - Red Pearl |
#4
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Re: Non SVX - Why would a fuel injector not inject fuel?
Also the first thing to check in those cases is:
The injector will have two wires,one is 12V(+) and the other is a pulse (-). 1- The injector MUST be in its place, or you can disconnect the fuel pump before continue. 2- Turn the key to the start position (when the dash lights lite) 3- Unplug the injector connection, and check the voltage in every wire. 4- One of them will have 12 volts or more, if there is no voltage, then maybe the EFI fuse is blown, or there is a bad connection. 5- The other will have a negative pulse when cranking the engine, you can check this with a LED light tester. If there is no pulse, then the problem may be harder to explain. Good luck.
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95´ Subaru SVX EURO 85' Mercedes 190 2.3-16 86' Mercedes 190E 70' Olds Toronado 98' Renault Chamade 82' Honda Prelude 79' Honda Accord awaiting restomod. 69' Mustang Hardtop 67' Jeep Ford Willys awaiting restoration. 67' IKA Torino Coupe 74' Renault Torino Coupe Last edited by MadMaxSvx; 09-18-2009 at 04:33 PM. |
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