I'm getting fuel to injectors but no voltage, is there a injector relay that could be bad or the computer (brain), or trigger points, thanks for your input...
2007-07-05 16:12:40 · 6 answers · asked by draymond31 1 in Cars & Transportation ➔ Car Makes ➔ Mercedes-Benz
My 1970 280SE has mechanical injection. I would be willing to bet that yours does too, so they don't need voltage to operate.
2007-07-05 16:16:47 · answer #1 · answered by sakotgrimes 4 · 2⤊ 0⤋
Most common problem for D jet injectors, no power to injectors is the trigger points in distributor. I would suggest removing and cleaning them use a point file or a piece of sand paper or some similar tool, after doing so blew them of or wipe them off, so that they are clean off any metal or oil residue. Also check the electrical connection for the trigger points they get oil on them and render them useless, it by cleaning the points it does not cure your problem then maybe the ECU.
But first replace the trigger unit, which is under the ignition distributor because it controls the injectors.
Remember this a d-jet the trigger points are the most common problem however with key on opening the throttle is supposed to trigger the injectors, test for power at the throttle position switch and at the trigger points if no power is found test at pressure sensor 'broken wires have become common' if still no power check for in line fuse located by computer and if still no power here and fuse is OK suspect ign switch I have never seen a 280 that this problem didn't puzzle every one it cross but don't doubt they are out there, be sure to inspect wire gang grounds once it's running again high resistance here will result in erratic performance. and check for oil leaks around the dist point for the connections to the trigger
2007-07-07 16:43:44 · answer #2 · answered by eddie m 2 · 0⤊ 0⤋
on d-jet the trigger points are the most common problem however with key on opening the throttle is supposed to trigger the injectors, test for power at the throttle position switch and at the trigger points if no power is found test at pressure sensor [broken wires have become common] if still no power check for inline fuse located by computer [taped to computer harness] if no power here [and fuse is ok suspect ign switch ] i have never seen a 280 druck but don't doubt they are out there, be sure to inspect gang grounds[once it's running again] high resistance here will result in erratic performance.
2007-07-07 01:53:45 · answer #3 · answered by hobbabob 6 · 0⤊ 0⤋
Most common problem for "D" jetronic no power to injectors is the trigger points in distributor.I would suggest removing and cleaning them use a point file or similar tool,after doing so run a piece of cardboard through them to clean off any metal or oil residue.Also check the electrical connection for the trigger points they get oil on them and render them useless,it by cleaning the points it does not cure your problem it maybe the ECU.You can e-mail me directly I might be able to send you a diagram for diagnostics.
2007-07-06 06:48:18 · answer #4 · answered by the bear facts 5 · 2⤊ 0⤋
replace the trigger unit, which is under the ignition distributor because it controls the injectors.
Check the connecting wires.
2007-07-07 00:04:26 · answer #5 · answered by Diana M 1 · 0⤊ 0⤋
payed to much money for a piece or crap sell it it sucks
2007-07-06 04:46:56 · answer #6 · answered by curtis2k9 1 · 0⤊ 2⤋