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I had my truck in the shop because it was stalling and running rough! He put a new computer, crankshaft sensor! I got it out of the shop and it still stalls and runs rough! I have replaced the cam shaft sensor and the Erg valve! After all of that it still don't run right! So what else could it be?
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Hello, There are a few known causes, but identifying which one is causing the issue on your vehicle will be up to diagnostic testing and inspection. First, inspect the underhood fuse box. When the cowl seal wears out, water will drain into the fuse box. This will cause all sorts of issues, so if there are other things going on, check this first. Then you have an issue where the filter gasket in the transmission will allow air to be pumped through the transmission, and the frothy air can cause issues with the torque converter and various sensors in the transmission. This would also cause stalling at other times. Another known issue is the idle air control system, where the valve may be clogged, preventing the engine from receiving sufficient air while the throttle body is closed. The engine bogs down and dies nearly immediately after the throttle is released and the engine is no longer braking the transmission. Another cause is the lock-up torque converter, which may stay locked until the transmission front pump stops forcing hydraulic fluid into the torque converter. This may not throw a check engine light, though it sounds like it should. Sometimes the crank and cam position sensors can prove to be the cause, but those sensors can be verified through scan testing.