Just replaced fuel pump on my 98 c1500,now it stalls
Bought a checker fuel pump module.after having it put in the truck did well for a week and started stalling.now it will run about 10 minutes and start getting sluggish,then stall.i can go back in about 2 hours and start it.replaced fuel filter and cap and rotor.i heard that the cheaper fuel pumps are garbage,but it has a 2 year warranty and another guy told me that the cheap fuel pump problem only applies to older ones where you buy the pump itself,not the whole module
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Re: just replaced fuel pump on my 98 c1500,now it stalls
Though they are more expensive, I only use dealer pumps. With so much "outsourcing" to foreign counties there is little or no quality control, especially in aftermarket parts...Dealer stuff is still slightly better and therefore a bit more reliable. It sounds a lot like your pump is getting hot and binding and is likely defective. You can test fuel pressure to verify this or just replace the pump. Doing this by "remote control", it's possible that I'm wrong...that's why testing is important.
Testimonial: "thanks alot.this is about the third similar opinion i have got.have to face it i guess"
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I had the exact problem with my 1993 chevy c1500. I found that the IAC was sticking so the engine would die at idle after warming up and the ignition module was pulsing the ECM intermittently after the engine warmed up so the fuel pump wasn't being turned on after the engine died....I replaced the ignition module and the IAC valve and all is good. I don't know if testing the ignition module reveals that it isn't sending pulses to the ECM.
This stalling is fuel related issue.When the fuel flow becomes low, the engine ask for fuel.But fuel pump does not send required fuel and engine stalls.In some cases, it stall then dies after stalling for few minutes.In some cases, if stalls for few seconds or minutes, then again get required fuel , as you accelerate more and engine starts/runs normally.But once this problem is started and it repeats again n again.This is indication f low fuel pressure.Get the fuel pressure checked and replace fuel pump and fuel filter.-----------
I would check the vacuum lines thoroughly as one may have collasped or previous owner replaced with a substandard one,which may be partially collaspe then upon warming up will vacuum itself shut causing the motor to surge then fail to run or start if it happens to be a main line that is affected.
I know it sounds crazy but check to see if the floor mat is blocking gas pedal. I have seen this alot in my 30 years as a master tech.the way you describe it sounds like all the other cust of mine that had the same issue. hope that is all it is. good luck and let me know.
Possibly faulty ignition module is the problem, stalls when engine is hot when you sit for a while it cools off and runs again until it heats up again, those are usually the symptoms of a bad ignition module and after a while it may give out all together and not run at all, usually if the module is at fault it shuts down the fuel pump so the engine don't load up with fuel, do to when engine continuously cranks over the injectors never stop squirting fuel and flood the engine do to lack of spark which is produced by the module, this could possibly be your problem.