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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-15-2005, 10:54 PM   #21
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ok i went online to napa auto parts and they have a better deal with parts they make exactly sure what engine you have and when looking there it showed the injector we had taken outta the car (guess thats what i get for going to autozone) so looks like we are gonna now put the old injector back in a diff cylinder run a compression test and then test the injectord for the clicking sound and then i guess go from there if the injector doesnt click then we will hafta give up 72 bucks for the high pressure one it says the 3800 engine is high pressure and the 3.8 is low
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Old 05-16-2005, 12:57 AM   #22
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Quote:
Originally Posted by wheelcm38
it is also mentioned in the Chiltons manual about a high and low pressure injectors, the one we took out looks like the one they show as a high pressure and the replacement looks like a low pressure
Maybe the new low pressure injector leaked because of the higher pressure of the vin C (3800) system? Worth checking into.
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Old 05-16-2005, 10:04 AM   #23
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Pull the #3 injectore plug. Bend down the contacts on a 194 bulb and install in the socket. Have someone crank the engine and the bulb should pulse.
If the light stays on the problem is in the ECM or ICM.
Thats why its flooding.
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Old 05-16-2005, 01:47 PM   #24
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the ecm or icm you refer to is that considered the main computer, if not then what does the letters stand for, tyvm
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Old 05-16-2005, 03:44 PM   #25
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ECU: Main Computer [Electronic Control Unit]
ICM: Main ignition controller. This sits UNDER the coilpack [Ignition Control Manager?]


-justin
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Old 05-16-2005, 04:36 PM   #26
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we are gonna try all these good ideas come wednesday and maybe pu a used puter to try instead of spending 107 and that not be it
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Old 05-16-2005, 06:10 PM   #27
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bought my used ecm for $20 at the yard. It was a factory rebuilt. I use it to swap any time the car is acting up and I can't pinpoint it.
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Old 05-16-2005, 10:22 PM   #28
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I don't know what they mean by high and low pressure, that doesn't make sense. Granted manufacturers do use different pressures, primarily to get the fuel flow they want from a given flow rated injector, and the pressure is set by the pressure regulator on the fuel rail. They may be confusing high and low impedance injectors, and there is a large difference there, plus the operating system in the ECM is different. Our cars use high impedance injectors, approx 14-16 ohms resistance across the terminals in the injector. The low impedance will read 2-4 ohms or so. The high impedance will draw just over 1 ampere to open, the low impedance will draw 4-6 amps and will likely destroy the injector driver in the ECM. If you still have the original injector out, you can try pulsing it with 12 volts across the terminals. If it is stuck, try some good carb cleaner like Berrymans in both ends of the injector and try pulsing it again. It may just be stuck, although they usually stick closed.
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Old 05-16-2005, 10:37 PM   #29
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In the chiltons manual it had pictures and talked about hgigh and low pressure injectors so we could see the difference in them the high pressure is deffinately a little longer, we are gonna I hope get back on this on wed and we have printed out all the suggestions to look at when we get there so we can go step by step to figure this out for sure, and there is also about a $0 difference in the 2 injectors mbut when i called auto zone to get one they said there was one part number and we called them back after seeing it was shorter and they still said 1 part number so we assumed it was just changed in the way it was made but that isnt the case, guess i am gonna start going back to napa auto parts for now on can trust them..
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Old 05-16-2005, 10:57 PM   #30
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What part number is on the stock injector? If it is the normal Bosch injector the part number will start with 280 and end with 901. The part number is on the plastic part where the harness connects. The 901 injector has an extended tip with several spray holes inside, but the extended tip has nothing to do with the pressure. It is designed to operate @ 43.5 psi of differential pressure to flow 19# per hour. This same injector will operate at 32 psi to 60+.
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