Okay, how do I tune this damn DPDIS?

[Asha'man]

I get detonation under load unless I run premium, and it's really starting to piss me off with premium up around $2.00/gal. I really have no idea where to start, I never see any info about it. Timing, I guess? No distributor to move around so I guess it'd have to be if the belt is off a tooth... Got any suggestions for stuff to try?

Ash

 

[Stinger]

Clean the motor out with the old water trick...

Pull a vac line off the intake (like the fpr one) and put it in a bucket of water...make sure you have a hand on the throttle so you can keep it running...don't let it flood out.

When you run out of water your piston tops, valves, etc. will be as clean as new...no more detonation (maybe).

Stinger

 

[Pro-Hawk]

Crap I never heard that one before I always thought you never touch a DP DIS 2.3L and just drive it

What plugs and gaps are you running?

Have you done a tune-up?

 

[G-90]

I had this occasionally with my DIS Ranger but it seemed to be related with air temp for me.
Hot humid days would do it with cheap reg gas but I ran next grade up 89 and it solved it.
Don't know what to suggest, maybe unhook battery for a few minutes.
You have an open air filter in the engine compartment?

 

[Cougar]

Clean the motor out with the old water trick...

Pull a vac line off the intake (like the fpr one) and put it in a bucket of water...make sure you have a hand on the throttle so you can keep it running...don't let it flood out.

When you run out of water your piston tops, valves, etc. will be as clean as new...no more detonation (maybe).

Stinger

That'll cause hydro-lock, stupid!

Everyone knows the best way to clean it is to burn off the dirt. drain your engine coolant and oil, and leave it redlined in neutral for about half an hour.

 

[Pro-Hawk]

That'll cause hydro-lock, stupid!

Everyone knows the best way to clean it is to burn off the dirt. drain your engine coolant and oil, and leave it redlined in neutral for about half an hour.

Should he run some Slick50 through it first

 

[Stinger]

That'll cause hydro-lock, stupid!

Everyone knows the best way to clean it is to burn off the dirt. drain your engine coolant and oil, and leave it redlined in neutral for about half an hour.

No, you only run the engine without oil when you are done draining it...start the motor to sling the oil off the crank (to get every last bit of old oil out).

Stinger

 

[Asha'man]

Uh huh. I guess there's nothing else for it but a tune-up. Soon's I finish paying my cell bill , I guess I'll do that.

Ash

 

[Pro-Hawk]

Uh huh. I guess there's nothing else for it but a tune-up. Soon's I finish paying my cell bill , I guess I'll do that.

Ash

Well since I like you I'll let you in on how I do...I take it out and beat the crap out of it untill it submits to my will

 

[Asha'man]

Like I don't anyway.

Ash

 

[Demented4.6]

I had a detonation problem as well and it ended up being a chunk of headgasket between cylinders was missing. it was only about an 1/8 inch piece. I figured it out after a compression test