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Car Forum / Nissan / Nissan Cars / September 2005Pick-up Pinging problems
Hi-Looking for suggestions to pinging problems in my 97 Nissan 4cyl p/u. To date, I've replaced air and fuel filters, done two fuel system treatments, replaced cap, rotor, wires and plugs, replaced cracked exhaust manifold. The condition corresponds to outside temp (read above 90F.), and demand on engine when climbing a grade that goes from 3000ft to 4000ft in a mile's distance. The shop I use has also pulled codes, but none came up. Also I have noticed hesitation at 3400rpm when hitting the aforementioned grade at full throttle (gotta get a run at the hill). Anyone have any ideas? Thanks! What grade fuel do you use? Try a higher octane fuel on your next tank and see if the problem is mitigated. Results of that test will point you in the right direction. Djay > Hi-Looking for suggestions to pinging problems in my 97 Nissan 4cyl p/u. > To [quoted text clipped - 7 lines] > full throttle (gotta get a run at the hill). Anyone have any ideas? > Thanks! > What grade fuel do you use? > Try a higher octane fuel on your next tank and see if the problem is [quoted text clipped - 13 lines] > > full throttle (gotta get a run at the hill). Anyone have any ideas? > > Thanks! Yea, try premium gas. Also buy gas at a higher elevation because it is formulated for higher elevations. Another thing that can cause pinging is a worn timing chain that has slipped but that seems very unlikely unless you have a LOT of miles on your truck. Back in the ancient days we used to just advance the timing a bit to get rid of pinging. Maybe your computer isn't getting all the information to it due to a bad sensor or something but that should have showed up when you read the codes. I would still locate the timing sensor and see if it looks OK. It's probably below the crankshaft pulley. >>What grade fuel do you use? >>Try a higher octane fuel on your next tank and see if the problem is [quoted text clipped - 34 lines] > the codes. I would still locate the timing sensor and see if it looks OK. > It's probably below the crankshaft pulley. You got it backwards. Higher elevations need less octane because there is less air. All other things being equal, your car gets more powerful the closer it gets to sea level, and even below. CD Doesn't matter if your at sea level or at 5k feet, you need to run higher octane when you are consistantly pulling loads up large inclines. You really need it when your at higher altitudes because of the lack of oxygen and the loss of power this entails. >>>What grade fuel do you use? >>>Try a higher octane fuel on your next tank and see if the problem is [quoted text clipped - 47 lines] > > CD > Back in the ancient days we used to just advance the timing a bit to get rid > of pinging. Maybe your computer isn't getting al Pinging usually gets worse if you advance the ignition timing and don't change the fuel to premium. Retarding the spark is what today's computer "driven" cars and trucks do when pinging occurs. I used to advance the spark on my cars to enhance performance... but going too far usually led to pinging. Al > > Back in the ancient days we used to just advance the timing a bit to get rid > > of pinging. Maybe your computer isn't getting al [quoted text clipped - 6 lines] > > Al You are correct. I mispoke. I hang my head in shame. > > > Back in the ancient days we used to just advance the timing a bit to get > rid [quoted text clipped - 9 lines] > > You are correct. I mispoke. I hang my head in shame. Naah... don't do that. We ALL get things wrong from time to time. Great thing is... you were helping. Al > > > > Back in the ancient days we used to just advance the timing a bit to get > > rid [quoted text clipped - 14 lines] > > Al Well, at least he probably doesn't even have a distributor to turn the wrong way ;-) |
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