Question about Nissan Altima
I am a mechanic and have the above said altima at work, the car has fuel pressure, good fire, but no injector pulse, i the notice the key hap a large hollow in it and realized the transponder chip was missing. Would really like to fix the car for my customer but am not sure how to go about it, any ideas other than send it to the dealer would really be appreciated. Thanks, David
Could put a resistor in the line at the switch,but without the old chip,can't tell how much resistance,maybe customer has a spare key?
Posted on Feb 16, 2012
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Posted on Jan 02, 2017
95-97 Maximas had a problem where condensation from the A/C would accumulate in the a/c evaporator case from the drain becoming restricted or blocked, When this would occur, condensation would drip onto the ECM and a problem would develop with misfire and/or starting. I would look at the ECM where the harness connects to it for corrosion problems. If you find it, there is a chemical spray which can be used to clean the terminals and/or you can clean them, although it is time consuming and difficult to due because of how small the terminals are. After things are cleaned up, lightly coat the connections with a dielectric grease. This will prevent electrolysis.I believe you can buy these at Radio shack and possibly at an automotive parts supplier.
Also a drop in voltage during the cranking phase will cause a weak spark. Your ignition is what pulses the injectors. It takes a minimum of 9.6 volts, but ideally you want at least 10.5 or more during the cranking phase if you want to get a spark worth anything. Check the voltage on the primary side of the coil while cranking the engine.
I'll watch to see if things work out for you, let me know. ....mybunkey
Posted on Apr 18, 2009
SOURCE: disable transponder chip keys
You have to measure the resistance across the key and get a resistor of the same value at radio shack and jump it across the wires at the security box, this way the security system thinks the key is always inserted. We did this with 1989 firebird some years ago and it worked great.
Posted on Jul 07, 2009
unfortunatly we cant do it it has to be done by dealer or locksmith.you would need the computer thatdownloads the key code but down my way home depot started selling these key fobs far more cheaper than the 150 dollrars the dealer wants
Posted on Feb 12, 2010
nissans have an issue with crank angle positioning sensor, you must remove it and check for resistance, it definetly sounds like it cause crank sensors sometimes work when cold then shut off.
Posted on Feb 18, 2011
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