BenzWorld Senior Member
Date registered: May 2007
Vehicle: 64' 220SEc, 72' 300SEL 6.3, lots of parts
Location: San Diego/Spring Valley
Mentioned: 0 Post(s)
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280SE 4.5 injectors 2&3 not firing
We have a problem on a M117,
No response to cylinders 2&3 while running.
At idle , I can disconnect the connectors to the injector body and no change (2,3) of idle quality
all others make a difference.
Also, during warm up, the exhaust manifold at 2,3 are cold to the touch during cold start operation. (yes I touch them)
Swapped out the 2 injectors and same result,
So I am wondering how to check the pulses at the connector to the injector body,
I have the digital volt/ohm meter, only, can I test static, or dynamic?
Compression good, good idle, no tailpipe crud blowing, valves adjusted, dirty intake manifold (old unknown seals and gaskets, an older motor,
While last run at freeway speed run mucho power at speed.
We've tried many things, plugs, points, wires, trigger points, tps, map sensor, brain box, ground connections, fuel pressure, all EFI subsystems have been cleaned, spiffed, touched and tested by substitution.
Any Ideas ?
Thanks in advance