E99 Questions for newbie

[russtwentyfour]

Hey guys new to this forum and new to compression ignition also, but I got a couple questions maybe ya'll can help out with. First when hold throttle lightly, like to maintain speed on flat ground truck is missing and herky jerky. Read on here about tps sensor being bad, so my question is it also does it with the cruise control engaged, is that still the tps sensor?
Next question, if i get on the throttle hard and then let off quickly the engine kinda kakles or misses before it returns to idle, also on does this when under load or in gear, wont do it in neutral. So is this normal?
By the way I have an E99 F350 single wheel RWD with 130k on the odometer, all stock. the truck is in perfect condition other than a couple of issues.
Thanks for any help.
Russ

[nccatfan]

I'd start by getting the injectors tested.

[russtwentyfour]

Just out of curiosity what do you think is wrong or going on with the injectors?

[revolvingsteel]

Subscribed! Mine does this only on occasion. Haven't found any answers yet.

[copracr]

I had similar symptoms. I had my mechanic perform a cylinder contribution test. He found that #1 cylinder was weak. At that point its either the injector or the cylinder (mechanical issue). New injector made it purr

["Stroker 8"]

[jacobford]

the ford house is saying the #6 injector is weak... and it wants to vibrate or shudder at 45 mph or so under load...if i let off the throttle or speed up to like 48 it goes away, has a slight miss once it first starts (why i got it tested in the first place) but once warm it runs like it has for the last 50k, fresh oil, bone stock e99 except the latter style intake and 293k on the odometer... i changed the valve cover harnesses 10k ago should i just replace the bad injector, or cough up the money for all 8? I DON'T WANT to screw with an engine that's lasted this long, but in my experience once something like an injector starts to fail...the others are soon to follow... wheres the best place to get quality stock injectors w/o paying an arm and a leg for them...

[copracr]

I replaced #1 30k miles ago. So far theres been no other failures. Im just too cheap to replace $700 worth of good parts.

I got an ebay reman

[nccatfan]

I'd be severely limited by budget, but would get all 8 if I could do so. No surprises when all 8 are new. Inj. nozzles can wear out over time and mess up the spray pattern. Thats not to mention wear on the solenoids and plungers too. Knock on wood, my originals are still strong @ 320,xxx miles.

[jacobford]

i don't know whats worse, having to drop a ton to replace "good" parts, or to keep crawling under the hood to replace them one at a time... i guess i'll do some figureing and maybe change the drivers side first and once i start to loose one on the pax side replace all of them... thanks for the input