Forum: Tuning

I just got my 02 5.3 L59 put in my 91 rcsb. It is running very rich and barely running. It has trouble starting and a lot of trouble idling. I have a...

So what is the response time and voltage on a good o2 sensor? Truck is an 07 avalanche with 5.3

05 gmc sierra 5.3, has the alternator with 2 pin regulator (computer controlled).. alternator charges fine, but the battery light comes on...

hey i was just wondering on were to start. my truck just started to throw a code on the over head on my dash saying hot engine coolant. the meater...

I cannot for the life of me get my truck to relearn the passlock3+ key ? I have gone thru the sequence 4 times and nothing ? 1 turn on let sit 10...

i read so pretty good articles about this guy has anyone used him?

I ordered my tune from Nelson's and forgot to ask if they can disable the DOD and have not been able to get through on the phone. Does anyon know if...

can someone help me with my tune, at least until allen calls me back i downloaded a file from the hpt repository and copied some stuff over, but...

i have these two and the diablo programmer said "unknown" after these two codes P0130E P0140A I had those two donno whay! P0102 MASS AIR...

Ok I have cats software which I don't have any ideal how different from HP tuner but in my constants what do I need to set my a/c type to so that...

A friend of mine asked me to tune his 07 Silverado with a 6sp Auto. Well I couldn't find the Spark Retard vs Torque Reduction table. It just has a...

What is max timing these trucks can handle before power is lost? I've heard that once at 26 there is only like 3hp compared to like 30 degrees...

can anyone tell me what these codes are 650 1153 i had my ECM edited : removed vats , rear O2s , emission extra any help would be great...

Ok so when me and my boss were tuning my truck we noticed that every time I got on it it would throw any where from 3 all the way up to 5 KR's. My...

Ok guys, i have been having issues for almost 8 months now. To start off with the truck is "stock" except for the exhaust and has a NP tune on it...

I'm looking for the Idle Startup Airflow Initial vs ECT table on an 05 Silverado ECU. This is the table that you modify so you won't have to pump the...

hey guys i bought a used pcm believing it was from a V8 TRUCK, 2001 operation system, i know i have to link it to my truck, but when i click on...

Ive done my own tuning on my lt1 camaros but nothing obdII. For my cars people shared there tunes for like builds to get you close. Can this be done...

I'm new to HPT, My question is I have a 99 Silverado 1500 that had a 4.8l. I put in a 05 6.0l. I downloaded a stock 6.0l tune from HPT Repository but...