Question about 1994 Nissan Pickup
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Posted on Jan 02, 2017
SOURCE: 94 Nissan Truck KA25E engine
You most likely need to replace said Mass Air Flow Sensor (MAFS). If you disconnect this sensor, the ECM uses other sensor data to "calculate" fuel delivery. Problem is, this method is not good for real time- meaning that when you hit the gas pedal, the ECM has to calculate the fuel needed and the engine doesn't rev up right, causing more of a driveability issue.
I've replaced quite a few of these sensors. Be sure to buy a new Nissan air filter when you buy the new MAFS. Even if you do the work, Nissan will want to see that should you have a parts warranty (12 months/ 12,000 miles) claim. No air filter replacement (with a Nissan part) = no warranty coverage.
This is not the most accurate test to use to check the operation of a MAFS, but it usually gives you an idea if you're in the right area- idle smooths when disconnected usually means you are in the right area.
Hope this is helpful!!
Nissan Scope Technician- 10+ years experience in Nissan dealership.
Posted on Nov 17, 2008
if you get a haynes repair manual and follow it step by step everything should go fine. or clintons. if you have questions about what its telling you to do then that would be a good thing to ask. the problem is there are alot of different designs for engines and it could be affected and it could not be. but if your not sure you definitly need a repair manual. it would tell you everything but it will guide you in the right direction
Posted on Mar 20, 2009
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