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Testing Fuel Injectors[240-260/80] posted by Bill on
Sunday, 28 June 1998, at 6:19 p.m.
We have a 1980 245 auto which idles rough and gets bad gas mileage. I suspect one or more of the injectors are bad. I have 6-7 old injectors I can substitute. Is there an easy way to test the spray pattern of the injectors so I can identify the bad one(s) and test the substitutes? Would anything else be a likely culpret? Thanks in advance!
Bill
Re: Testing Fuel Injectors[240-260/80] posted by Andy Peck on
Sunday, 28 June 1998, at 8:47 p.m.
Anther possibility might be the injector seals (o-rings). They tend to get brittle and allow air to leak around them.+
Re: Testing Fuel Injectors[240-260/80] posted by Gary DiFrancesco on
Tuesday, 30 June 1998, at 9:30 a.m.
I agree. Had a '82 240 that idled real bad and suck gas. Local mechanic suggested that I change the injector seals. Add a few $ in o-rings and maybe 1/2 an hour of my time, and the engine purred and was much more polite with the gas.
Changing the seals is an easy job for a DIYer. Undo the injector hoses to each injector with two wrenches. Remove the small bolt that holds the injector and it holder to the cylinder head, and pull the assembly out. It may be a little sticky if the o-rings have hardened up real good. At your vice, stradle the injector with the jaws so the the holder is supported. Don't clamp onto the holder with the jaws. The nozzle end should be facing up. Place over the nozzle end of the injector a flat and hard piece of plastic. I used some 1/4" PVC plastic I had laying around. Using a hammer, lightly tap the plastic to push the injector out of the top of the holder. This will appear nerve wracking, but the needle of the injector is just below the outter ring of the injector, so no damage will occur if you don't pound the injector with the hammer. With everything apart, clean up the parts, replace the inner and outter o-rings, and put it all back together.
Have fun.
--Gary DiFrancesco