i think somethings wrong with my truck

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07-22-2007, 08:38 PM
the_jester

i think somethings wrong with my truck

well, let me give you a little background info. first i changed the spark plugs in my silverado and gained a few psi, centrifigal supercharger. so i thought i should change then on my sub, but its a sidemount old style magnuson, so i was looking at it trying to decide if i was gonna take the super off or not and i loosened one worm clamp then decided to just become stretch armstrong and snake my hand up in there and changed them. but i forgot about the worm clamp. till a few days later when i was trying everything i could think of to find out why my truck was runnig like garbage. including changing back to the stack stat. i noticed the clamp.
well now i have my new tune and im knocking like crazy. this is my family hauler so i drive it alot and cant have this. so i added like 3 bottles of octane booster to the tank. i think it helped some, but whenever i step on the gas and it passes 3 psi it lets out a string of knock. its wierd that i can boost 1 or 2 but not 3. and also if i just nail it its fine
07-23-2007, 09:33 AM
SCIV

Does it need time to relearn? Did you put the lower Stat back in?
07-23-2007, 12:40 PM
the_jester

yeah, i just put the 160 back in sunday, and i think its doing better. i'm paranoid now so i think everything is knock. i hope its better. but i am getting a p 1336 code. which is crank position sensor not learned. i dont know if thats related to the new tune or not. i didnt have any problems at all when i put the new tune in my silvy.
07-23-2007, 05:17 PM
txarkitekt

Quote:

Originally Posted by the_jester

yeah, i just put the 160 back in sunday, and i think its doing better. i'm paranoid now so i think everything is knock. i hope its better. but i am getting a p 1336 code. which is crank position sensor not learned. i dont know if thats related to the new tune or not. i didnt have any problems at all when i put the new tune in my silvy.

The code the PCM is throwing IS from the new PCM. It will take a bit for it to relearn everything. Do you know someone who has a scanner to do a crank relearn? If this thing is the family DD, get it done now. A dealer will do it for $$$, but sometimes if you schmooze your way into the service area, you can have it done if you slip a tech a $20... If not, check with a decent mechanic in the area. He will charge you for an hour worth of work, even though it will only take 15-30 minutes. You will have to bite that bullet. Once the crank relearn is complete, go ahead and look over your engine compartment to make sure everyting is on the way it is suppose to be. Then--make sure you have the normal fuel (no octane booster) in the tank---drive it around like you normally do for 250-300 miles (a full tank of gas). The relearn should be complete by then.
07-23-2007, 05:27 PM
RedHeartbeat

Yeah, it would help if you were to go into your profile and fill in the "location" information. If someone is near you with HPTuner software they can do the crankshaft relearn for you without having to buy a license for your PCM.
07-23-2007, 07:53 PM
the_jester

sorry, i did now, i had that all filled in in the old forum, but i changed my name in the new one, and lost everything. well, i have a scanner, but nothing to do a relearn. so the stealership is the best place, i hate them, they tried to rip me off telling me i needed new brakes and rotors and wouldnt take no for an answer till i finally walked out. i went home and pulled my wheels off and checked and they were fine, pads were fine and rotors were perfect. tried to tell me i needed to pay like 1900 dollars. ass jockeys. so will a local mechanic be able to do this or is it something i can buy.
07-23-2007, 08:12 PM
RedHeartbeat

You can always buy your own copy of HPTuner software and learn to do your own tuning later. The hardware will take care of the learn issue. If you have a lifetime tune from NelsonPerformance you can use it to feed him data for new tune updates. Nelson can get you the HPT stuff if you decide to go that route.
07-23-2007, 08:41 PM
COWL327

Quote:

Originally Posted by RedHeartbeat

You can always buy your own copy of HPTuner software and learn to do your own tuning later. The hardware will take care of the learn issue. If you have a lifetime tune from NelsonPerformance you can use it to feed him data for new tune updates. Nelson can get you the HPT stuff if you decide to go that route.

Thats funny,Allen didnt offer that too me.That would have been better than me tuning it for the last year!:bash::eek:
07-23-2007, 08:45 PM
RedHeartbeat

Did you ask? You had a NP tune before you bought the software didn't you?
07-23-2007, 09:24 PM
the_jester

is hp tuner expensive, but i may get it even if it is, because i have two vehicles with the gen 3 v8 and may have 3 soon. im trying to talk the wife into an
impala ss
07-23-2007, 09:27 PM
COWL327

Quote:

Originally Posted by RedHeartbeat

Did you ask? You had a NP tune before you bought the software didn't you?

Yea...I just never asked him,But his emails said LAST tune...I figured that meant no more:cry:
07-23-2007, 09:32 PM
RedHeartbeat

Once you say you want an unlocked PCM and want to start tuning then it's your's. If the PCM isn't locked it's open for you to eff it up and say it's his fault. It's a liability thing. With the lifetime tune you can send him scans of the vehicle while driving and he can make an update to a locked PCM and mail it to you.
07-23-2007, 09:49 PM
COWL327

Well.Allen you game.....Ill gladly try it and Ill throw in an extra pcm to boot.Or whatever:duh:
07-25-2007, 10:13 AM
txarkitekt

HPT is pricey. I wouldn't buy it until your have some good knowledge with tuning.
Have a local shop do it. Make sure they specialize in GM vehicles. Stealerships will cost more. But like I said, if you know someone or if you can nudge your way into the back and slide a tech some cash, that would be the best route. But there are good GM only shops out there that do work that is AS GOOD or better than stealerships...