AEM in their 30-4110 PDF states that running the LSU 4.9 at less than 0.95 lambda shortens its life. Should we be running these Snipers at anything less that 14:1 and expecting longevity?? AEM: IMPORTANT Notes - PLEASE READ The sensor contains a ceramic module and should not be subject to mechanical or thermal shock or it may be damaged. The sensor is not designed for operation on leaded fuels, doing so will dramatically shorten sensor life. Long term running in the rich region (Lambda < 0.95) will shorten sensor life. High exhaust temperatures (over 850C) will shorten sensor life. Engine oil consumption at a rate greater than 1 quart per 1,000 miles will shorten sensor life. With the UEGO Sensor installed, do not run the engine without power applied to the gauge.

​@Alan Conner well sir I have been thru about 8 or more 02 sensors over last 4 maybe 5 years. The one I have now has lasted over a year the trick to keeping it alive was moving it 6 inches long further downstream

Did this actually work? I’m having the same issue with mine. Idles great but dies when shifting into drive. Have to bump the gas to help it not die.

They dont include a plate with the Hyperspark kit

Did you ever figure it out

I'll bet you have (or had) a loose connection on one of the injectors. I had the same rich condition and rough running myself. Just fixed it - found one injector plug had rattled out. Sorted that out and the engine starts from dead cold just like it should now.

@hughjanus3235 thanks for the tip, I'm going to look Into this. I haven't solved this problem yet. Thought the problem was too small of an alternator, so I installed a 150 amp powermaster unit. Still running rich though, I hope it's as simple as a loose connection.

@@paulleonardo4906 Leaking manifold or header gaskets? That'll cause it to run rich too. Also the IAC should be adjusted between 8-12%

The alternator on the truck was a factory 55 amp DELCO. We determined this was insufficient for the EFI system. Never ended up being able to fix the unit, even after sending it to Holley for repair. We ended up needing to replace the whole unit, but now with a brand new Powermaster 140amp alternator the truck is running fantastic.

Just installed mine last weekend, fired it up at 18degF yesterday morning and it fired like a new car

Also, 69 Olds 442, 400ci

Not inside the cap, you can put some on the terminal or the boot of the plug wire that plugs on your cap

Set your rev limiters and tach will compensate.

Hyperspark doesn't learn only fuel learns

I’m running an HEI that I bought off of Amazon. It’s in my 355 with a 480 lift cam, 8° initial Timing runs beautiful.

Have you re-checked your timing….found out mine actually handles 3* higher than factory setting and runs very well

park

I have the SAME issue!! What do we do???

So here is my fix.it runs great now..so that little progressive linkage is no good secondaries open way to late 40% is no good missing to much range.what I did was straighten the original linkage piece just slightly so they open at around 14%..then go in an tell computer new range..also had adjusted secondary spring so it's not so aggressive.

Throttle lever extension is solution for stiff tip in

Open up your throttle blades using the idle speed screw!

I read to get a fixed orifice pcv valve, also where is the pcv supposed to be hooked up to, I thought it was for the front plug, but in the video they have their routed to the back, would that make a difference?

@@thinetaco3722 it doesn’t matter where you put the pcv setup. Usually goes towards the back for convenience to the back of the carb. It will vent positive pressure out of any hole in a valve cover. Wagner is a adjustable pcv valve that you can adjust using a vacuum gauge then lock it in.

It varies depending on the combination but you should expect something in the 40-60 range

@@HolleyPerformance ok thanks and after how many miles with the sniper unit stop learning ? When on the freeway at about 3100 rpms my car will have a jump in AFR then go back down to what it's set for. (Street/strip) i have put about 200 miles on it.

No, sniper will not control an LS ignition system. We recommend a terminator X system for that application.

@@HolleyPerformance msd box terminatior stealth

Hi! You want that number to be as low as possible. It actually means the amount of correction your sniper is making to you fuel table, so the lower the better. If you sniper has learned "100%" as you mention, your learning graph would read 0%... But it really isn't that simple. Drive around for a couple of weeks, in all conditions, then remember to transfer the learn table to the fuel table. Do it again and you should see lower numbers on the learn table.

Oh wow…thanks. I was thinking about it completely backwards. Thanks for making it make sense for me. Now off to plan a new fuel tank and in tank pump to get rid of the angry mosquito sound of the external fuel pump. Cheers!

Make sure you don't have any exhaust leaks, or leaks around the exhaust O2 sensor.

Hi Rolando. I have this same problem. Did your resolve the issue? I hope you did and I would really appreciate it very much to know how you got it fixed. My mechanic cannot find the problem. Thank you.

Same does yours make a super loud sucking noise when its running i didnt think it would be as loud as it is

JT Epps yep

​@@jtepps5289 a whistle noise can be had if you don't use 4 hole spaer

@@cfmechanic a 4 hole what?

🌮

This car has a generator on it as did most 64 Mustangs. just above idle the generator starts charging better.

no, no it doesn't.

tell us you have no clue without saying you have no clue

All efi, hell even carburetors require tuning. It's not the product fault that you do not have a basic understanding of internal combustion engines, or how to make one run. Brand new cars have computers that work right.. after hundreds of hours of calibration for the engine/vehicle platform.

Sounds like you have an intake vacuum leak

Dang, I wish you were my neighbor.😁

I'm having the same problem I believe you right there's a vacuum leak somewhere I need to find it

So you don't know how to tune.