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Just because it's cheap doesn't mean it won't do the job. I have a $20 SX cable that I use to read & write to p01 & p59 PCM's. The $20 tool is just the gateway, it's the software that you use that dictates what it can do. The PCM can vary PWM depending on load to help jeep trans temps down...

Yes, which engine is in it will effect which scanner you need. And obd2 only dictates that a universal plug is used and that a generic scanner can read the codes, beyond that there is DOZENS of different data protocols used, pwm, voltage based, high speed, low speed, can bus, lan, and so on. For...

You can pick up vcxdiag on amazon for around $110 last I checked and it will give you full oem scanner ability through your laptop. Otherwise you could try something like the torque app with a bluetooth to obd2 dongle. The TCC lockup valve is a known problem area in the 4l80e. Sonnax and transgo...

A failing torque converter can most definitely give a shudder while running down the road. Hook a scanner up and monitor calculated gear ratio to see if it stays solid and watch converter slippage. If it's slipping bad enough to shudder I would expect to see it on the scanner.

I can count on 1 hand how many of them I've seen fail. Sounds like they didn't hook it up correctly when they did the conversion or you have a bad ground.

I'm not a fan of the posi lok cable for the np243 myself, I actually prefer the late model 5 pin plastic actuators. If you still have the 2 pin thermal actuator, they are VERY failure prone. And the np243 doesn't use an encoder motor, it has an electric shift motor on the transfer case and it...

I'm around most of the time anymore. My back doesn't let me do much, but I need my shop space back so I can try and do a few things. I just picked up 3 other engines is the reason I'm in a crunch trying to get room back.

Need to know which transfer case you have. Push button in a 97 is most likely a np243 which is a very solid case, rarely gives trouble, but it could be a late 97 which offered the np246 case. Np243 only has 2 wheel drive, 4 high, & 4 low, np246 adds in an option for auto 4x4.

Dex/merc fluid only unless you want to deal with leaks and a possible rebuild in 6-12 months. GM says it's backwards compatible because the patent on dex3 expired, so they recommend there new fluid, and if your trans fails in 6+ months they get you for a replacement.

Welcome to the truck stop.

There is nothing wrong with SAC injectors, IMHO they are the ONLY way to go if you can afford them. I put SAC 45 overs in mine before the SAC00 were out(would have went with them instead had they been available). Some people get lucky with the cheaper injectors, but others get pissed off and...

I've got a 95 929 I'll give you if you want it. It came out of my Sub with 162k miles on it. The heads had the typical cracks between the valves. The only reason I pulled it was it lost coolant under boost, if I drove it easy around town it didn't lose hardly any coolant. The only real issues it...

Dex3 and mercon are basically the same fluid. You won't find a bottle labeled dex 3 as the patent ran out on dex3 back in 06. Just make sure it doesn't say dex vi compatible on it.

Use ONLY Bosch injectors. If the problem started with your injectors, then it is most likely your injectors. Balance rates are a diagnostic tool, but not the end all be all of diagnostics. I like to ramp up the rail pressure and see if they stay steady. Weak injectors will go all over the place...

Each trinary switch uses it's own wiring colors. They normally use 4 wires, 2 for the compressor side, and the other 2 for the fan control side. The factory system didn't use a trinary or even a binary switch. GM installed a high pressure cutout switch on r134 systems in the high side to shut...

Some people wire it so the fan engages with the AC, but this will have your fan clutch locked in solid whenever your compressor is running, and that big fan can draw some power running for no reason. Installing a trinary switch or a high pressure activated switch is a much better option as it...

Dex/merc fluid unless you want to rebuild your trans in 6 months to a year. Dex vi fluid is not fully compatible with older seals. It is a thinner synthetic fluid that GM came out with to try and eek out a tad more mpg's, and being a synthetic base stock with no additives to reach the desired...

Desired and actual timing is generally checked while doing a timeset, and time set is only required on OBD1, obd2 can go straight to a tdc offset relearn(but doing a timeset can come in handy when trying to dial in your tdc offset to see how close you are to hitting the magic 3.5 degrees).

Not always true. I just set red97's for him. It was at -.88 with his old pump, it went to -2.46 and set a resistor error when he installed his new pump WITHOUT telling it to do a relearn. So they CAN relearn on there own(seen it with my own eyes).

A trinary switch does 3 things, it provides low pressure shut down(opens around 40 psi), it also provides high pressure shutdown (opens around 425-450), and they also provide an output to control electric fans(generally come on around 225-250). 2 wires are for the compressor control and the...