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I have a 2000 infiniti g20 manual. I've been experiencing a strange bucking in the RPM on my car between 1700, and 2500 RPM when the car is sitting or is in first gear. No bucking or surge when driving normally (even in first gear for most cases, only when driving slow) or through any other gear.
So far I've replaced...
-dizzy cap and rotor
-plugs and wires
-tested 3 different MAFs (2 of them brand new)
-regrounded the MAF, and replaced the harness plug adapter (soldered and shrink wrapped the wires)
-adjusted TPS and set the based voltage at multiple points between .3v-.4v
-cleaned my TB
-cleaned and resoldered the crusty corroded wire in my fuse box feeding the iginition coil (the wires/box next to the battery under the hood)
-new fuel filter
-new refurbished/flow tested fuel injectors
-new OEM FPR
-new Bosch front and rear O2
Granted, all of these things have helped the car to run significantly better. But the surge bucking around the RPM range I stated is ALWAYS THE SAME. I think I'm narrowing it down to being a distributor issue. Anyone willing to confirm, is a good portion of the fuel map is also dependent upon the camshaft position sensor?
So I took the distributor cap off last night, to inspect the trigger wheel some more, and it appears maybe some debris could have been floating around chipping the outer edge of the optical camshaft position sensor wheel. On the 00-01 distributors, it looks like the frequency of notches for camshaft degree are a lot finer compared to other Nissan trigger wheels I've seen before in other distributors.
My question, anyone knowledgeable about this part of the car, and impact of the CAS trigger wheel willing to chime in on whether they think this could be causing the symptoms I've described? I'd hate to just keep throwing money at the problem, but lacking a good scanner to see exactly what the ECU is doing is probably not helping my cause either. All opinions welcome.
So far I've replaced...
-dizzy cap and rotor
-plugs and wires
-tested 3 different MAFs (2 of them brand new)
-regrounded the MAF, and replaced the harness plug adapter (soldered and shrink wrapped the wires)
-adjusted TPS and set the based voltage at multiple points between .3v-.4v
-cleaned my TB
-cleaned and resoldered the crusty corroded wire in my fuse box feeding the iginition coil (the wires/box next to the battery under the hood)
-new fuel filter
-new refurbished/flow tested fuel injectors
-new OEM FPR
-new Bosch front and rear O2
Granted, all of these things have helped the car to run significantly better. But the surge bucking around the RPM range I stated is ALWAYS THE SAME. I think I'm narrowing it down to being a distributor issue. Anyone willing to confirm, is a good portion of the fuel map is also dependent upon the camshaft position sensor?
So I took the distributor cap off last night, to inspect the trigger wheel some more, and it appears maybe some debris could have been floating around chipping the outer edge of the optical camshaft position sensor wheel. On the 00-01 distributors, it looks like the frequency of notches for camshaft degree are a lot finer compared to other Nissan trigger wheels I've seen before in other distributors.
My question, anyone knowledgeable about this part of the car, and impact of the CAS trigger wheel willing to chime in on whether they think this could be causing the symptoms I've described? I'd hate to just keep throwing money at the problem, but lacking a good scanner to see exactly what the ECU is doing is probably not helping my cause either. All opinions welcome.