240 Fuel Injector Clean
#1
06-20-2013, 10:14 AM
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240 Fuel Injector Clean
Recently bought a 1987 Volvo 240dl on a steal and am going through the car replacing anything that might be at it's last wit in hopes of getting it running. Fuel system was first and is done but I'm still not getting enough fuel to the injectors to get it to a full start.
My question is with it not running a fuel additive to clean the injectors won't do me much good (as far as I'm aware). What's the best way to go about cleaning the injectors and getting them in tip top shape?
My question is with it not running a fuel additive to clean the injectors won't do me much good (as far as I'm aware). What's the best way to go about cleaning the injectors and getting them in tip top shape?
#2
06-20-2013, 11:54 AM
is your fuel pressure good when the pumps are running?
87's were the last year of the bad ('bio degradable') wiring harnesses (started in about 83). in particular, the ignition harness that goes from the ICU on the right fender behind the headlight, this harness goes under the engine and over to the coil and stuff, oil spills and such get on it, and the insulation flakes off. the cconnector to that 'chrysler' ICU (ignition control unit) is problematic too. bad news, this harness is no longer available from the mothership (I have an 87). If you unplug it from the ICU, pull it straight out, do not rock it. use a small tool to slightly 'tighten' the pin sleeves in the plug. use plenty of dielectric grease on it when you reassemble it.
87's were the last year of the bad ('bio degradable') wiring harnesses (started in about 83). in particular, the ignition harness that goes from the ICU on the right fender behind the headlight, this harness goes under the engine and over to the coil and stuff, oil spills and such get on it, and the insulation flakes off. the cconnector to that 'chrysler' ICU (ignition control unit) is problematic too. bad news, this harness is no longer available from the mothership (I have an 87). If you unplug it from the ICU, pull it straight out, do not rock it. use a small tool to slightly 'tighten' the pin sleeves in the plug. use plenty of dielectric grease on it when you reassemble it.
#3
06-20-2013, 12:12 PM
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Fuel Relay does it's job about 70% of the times we've turned the car over. That will be replaced today along with (another) full tank of gas*.
*made the mistake of disconnecting the fuel lines leading to the external pump to see if fuel was getting there and got a mouthful of super.
Will update tomorrow on the progress. If replacing the relay/adding gas does get the car going would a fuel additive or fuel injector cleaner do the trick?
*made the mistake of disconnecting the fuel lines leading to the external pump to see if fuel was getting there and got a mouthful of super.
Will update tomorrow on the progress. If replacing the relay/adding gas does get the car going would a fuel additive or fuel injector cleaner do the trick?
#4
06-20-2013, 12:41 PM
I've never found gasoline additives to do much of anything.
note the 'fuel pump relay' on these LH2.x cars (yours is LH2.2) is actually two separate relays inside, one relay powers the ECU, injectors, etc, and the other relay powers the pumps. the pump relay won't be turned on until the ECU sees the engine turning over via pulses from the ICU which in turn is getting them from the hall sensor in the distributor.
note the 'fuel pump relay' on these LH2.x cars (yours is LH2.2) is actually two separate relays inside, one relay powers the ECU, injectors, etc, and the other relay powers the pumps. the pump relay won't be turned on until the ECU sees the engine turning over via pulses from the ICU which in turn is getting them from the hall sensor in the distributor.
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