Never had one of them sniper thingees

Surely, that's not curb idle

Or it must not be adjusted correctly

Or that's one heck of a vacuum leak.

How long was you planning on letting it idle that high before you fixed the issue?

-----JEEPFELLER

 

I hope to fix the vacuum leak soon. Waiting on my buddie's schedule to clear. He's the mechanic

 

I have no clue if this is what you have

There are many videos

I watched this one

I have a 4 barrel Holley 390 on my 258

As I watched the sniper video, the feller talking

Stressed checking the secondary's to make sure they were fully shut

That would sorta be considered a vacuum leak since air would be introduced in

when it shouldn't be. He also showed saving the inputs by cycling the key off and on.

I have about a 20% understanding of my Android Phone I am able to

Call/ Answer/ Take a picture/ talk text/ and attempt to read microscopic stuff

So far......Looks like I'm your feller till another shows up!

-----JEEPFELLER

 

So does having an idle at 1800+ for a month or two cause dmg to the vehical?

 

If you suspect a vacuum leak is causing the high idle, I would be wary of leaning out a cylinder and burning a valve.

 

I would sure fix that issue, as a normal high idle for most folks should be no more than 1200-1500, with the lower being more normal. I would not consider that safe to drive having an idle at 1800.

 

What they said. It’s not that a high idle will damage anything. It can handle 1800 all day long. As long as it’s not overheating.
It’s the cause of the high idle that is the concern. If it’s the Sniper acting up, that’s one thing. But if it’s a true vacuum leak somewhere, that can actually cause damage.

Can you see real time oxygen sensor readings? More to the point though, would be what is your AFR reading at that high idle?

 

What sniper setup do you have. 4bbl or BBD?

Normally, it would not hurt anything as the FI is probably adjusting the mixture to compensate for the leak however you could be sucking in dirty air through the vacuum leak.
Idling at 1800 is probably not any worse then driving it at 1800 on the freeway all day.

My question is, did it ever idle properly before or just started to idle high?
IS something mechanical binding the throttle?

 

I found the vacuum leak and taped it up. Sprayed the Carb Cleaner around it and the idle did not fluctuate. But the idle is still running 1500+

 

Yes, it did idle normally before the high idle.

 

Glad you fixed a leak. Did you find it using the same carb cleaner method? No other leaks found then?

Did you check into the secondary butterflies being blocked open slightly, as suggested by the video (which I didn’t watch yet) or is yours a 2bbl version?

 

Yes, I located the vacuum leak using the carb cleaner method. No others leaks found.

Not sure about the secondary butterflies. I have a Sniper BBD EFI for Jeeps

 

Yes, I located the vacuum leak using the carb cleaner method. No others leaks found.

Not sure about the secondary butterflies. I have a Sniper BBD EFI for Jeeps

No secondaries on the Sniper BBD.

Search for another leak just to be sure.

If you don't find any other leaks, try to run through the initial Sniper setup Wizard again. Your IAC might be off.

 

Are you sure you are not in England, and have the Elton John "Rocket Man" version of the EFI on there? Idle should NOT continue to stay high like it is, so something is hanging up somewhere for sure.
I would be pulling off linkage, sensors, wire connectors, eventually even try a regular carb on it, to see what the heck is going on with the whole thing.

 

A Sniper EFI guru says there's another vacuum leak. Will deal with it tomorrow