Guest livewire23 Posted February 20, 2003 Share Posted February 20, 2003 I was probing the injectors yesterday, and most of them read around 3 ohms, but #4 and #5 read in the mid 2-300s. then I probed the plugs that connect to the injectors, and most of them were good, but the ones that were plugged into #3 and #4 I think, were reading around 1800 ohms or so. I ran out of electrical contact cleaner, so I didnt get a chance to spray it on everything. But I was wondering if I should just clean it out, or is it time for new injectors? So far I've managed to avoid buying new injectors, and I'd like to continue avoiding it. Could this be causing my high RPM power losses? Basically when I try some full throttle passes, the first pass the car flies like a bat outta hell, with a ton of squat and wheelspin and all that fun stuff. Then the next time it gets to around 4k and coughs and sputters and chokes on its own exhaust. Almost like it was so rich that it was flooded. If I disconnect all the injectors and start it, it'll fire right up, , run for a second, and then die. Then if I give it a second and hook it back up, it can run to an even higher RPM. but if i drive for a while, and then smash the gas, it slugs its way up to 3500, and then coughs and wavers around 3k. It doesnt drop all the way back to idle or anything like that. Right now the AFR, TPS, CSV are all disconnected, cuz they made the engine run like crap. Im almost certain Im gonna sell the car to make some money for the swap, so Im basically just trying to do as little as possible to make it a sellable fun ride for the next buyer, without dumping too much $$$ in it. I'm probably going for a 240Z (or maybe 280 again) for the next project car. Looking to pay around $100-300, in case anyone happens to see one in norcal. Ill be in Iowa till sunday, I'll try to keep up with the board while im there, but dont mind me if I cant reply until then. Quote Link to comment Share on other sites More sharing options...
Guest livewire23 Posted February 24, 2003 Share Posted February 24, 2003 While I was in Iowa, I talked to someone who said he had this problem in his 240SX after he got it back from the shop once. It turns out his MAF was completely disconnected. But I dont see how this would apply to me, the AFM is securely attached. Where is the AFM grounded? Is it just grounded through the connector, or is there a seperate ground somewhere? Quote Link to comment Share on other sites More sharing options...
Guest livewire23 Posted March 5, 2003 Share Posted March 5, 2003 no-one will tell me how the AFM is grounded? Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted March 5, 2003 Share Posted March 5, 2003 Keep trying to get good readings on your injectors - they will fail open and not work, you will not see them only partially open to what you were reading. The high readings are most likely to be measurement error, caused by bad connections. Clean up the connections and verify the resistance through the harness. The AFM is grounded through the cable. A wire in the harness will then connect to the chassis at the intake manifold, I believe. Good luck. Quote Link to comment Share on other sites More sharing options...
fl327 Posted March 6, 2003 Share Posted March 6, 2003 you can just take wire off afm and ground to chassis, i i did it once to setup my car for the first time. i dont know which pin it is on l jetronic though. Quote Link to comment Share on other sites More sharing options...
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