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Truck stutters
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<blockquote data-quote="akheathen" data-source="post: 8251171" data-attributes="member: 629234"><p>actually, alternator feeds its field from the stator output after start-up, fyi.......</p><p></p><p>i noticed that you said there were a bunch of 8awg grounds for a 400a system. i believe that is your problem right there. the ground strap from the back of the left head to the firewall is likely toasted by now. at the least, you should have 3 runs of 4awg from the engine to the firewall, or equivalent in other wire size. under 10.5v and your fuel injectors shut off, and ignitor power is weak for the coil. on top of that, you may have damaged the ground runs to the ecu and body, hopefully not internally in the ecu, if this is the case. these trucks can actually run real nice, and be especially good to drive as a manual. only thing i don't really like is the decay rate and small/slow response of the iac valve. normally, if they do give you a problem, you just clean them out with throttle body cleaner and they work like new...... same goes for all of them between then and now. the tps is common to need replacement, and the ignitor around the same time as the fuel pump (100-150k) only real reason to put a carb on it is if you have no means to tune the ecu for whatever engine work you do....... even then, that comes down to lack of know-how, as a tunercat, or efilive/similar tuner is cheaper than a gen2 intake and carb, not to mention you would want to throw a stand-alone ignition in there, like a hei, or aftermarket, as the stock timing advance is done via ecu...... i digress....</p><p></p><p>long story short: upgrade your engine grounding, and complete the system as a single system, at least in the grounding of everything, and i would suggest you do a pinout from the ecu to grounds/ignitor/block. good luck.</p></blockquote><p></p>
[QUOTE="akheathen, post: 8251171, member: 629234"] actually, alternator feeds its field from the stator output after start-up, fyi....... i noticed that you said there were a bunch of 8awg grounds for a 400a system. i believe that is your problem right there. the ground strap from the back of the left head to the firewall is likely toasted by now. at the least, you should have 3 runs of 4awg from the engine to the firewall, or equivalent in other wire size. under 10.5v and your fuel injectors shut off, and ignitor power is weak for the coil. on top of that, you may have damaged the ground runs to the ecu and body, hopefully not internally in the ecu, if this is the case. these trucks can actually run real nice, and be especially good to drive as a manual. only thing i don't really like is the decay rate and small/slow response of the iac valve. normally, if they do give you a problem, you just clean them out with throttle body cleaner and they work like new...... same goes for all of them between then and now. the tps is common to need replacement, and the ignitor around the same time as the fuel pump (100-150k) only real reason to put a carb on it is if you have no means to tune the ecu for whatever engine work you do....... even then, that comes down to lack of know-how, as a tunercat, or efilive/similar tuner is cheaper than a gen2 intake and carb, not to mention you would want to throw a stand-alone ignition in there, like a hei, or aftermarket, as the stock timing advance is done via ecu...... i digress.... long story short: upgrade your engine grounding, and complete the system as a single system, at least in the grounding of everything, and i would suggest you do a pinout from the ecu to grounds/ignitor/block. good luck. [/QUOTE]
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