Pinging & Homemade Induction

[Ross-N-Chicago]

OK, the heat is out in full force here in Chicago and now I have the X knocking at about 1700-1900 rpms and at no other times. Is it because I have a PVC wrapped induction and drilled airbox that lets in too much hot air? Or is it possibly a bad tank of gas? Has anyone else encountered this and would making the jump to KKM or the ebay kit for $175 solve the problem? Never had it before and the new air tube was put in two months ago. Thanks...

 

[stilbo]

Pinging on '91-94 Explorers...

Go to the tech area and do a search on "pinging" and "detonation"...
I've contributed my 10 cents on this subject as well as others..
DO not spend gobs of money on BS fixes.....
Just tighten the lower intake manifold to head bolts so your engine will stop sucking oil into intakes.
That increases compression ratio and increased compression ratio = pinging...
unless you are running 105 octane av gas.....
Do the search..
do the fix...
Worse case scenario...
You have to replace the intake manifold gasket..

But DO NOT spend a ton of $ on majic mystery multiple part replacements....

Seen it done and it pisses people off and then they ruin teir lives by buying a Honda...

Dr. Ron

 

[stilbo]

hot air..

Re read your post....
Check the manifold bolts but all that hot air could be your culprit as well...
colder the air the more denser the air charge...
It's hot here in NW Indiana too!

Wanna buy a clean '93 for $4995.00?

 

[Ross-N-Chicago]

I've already retorqued the lower bolts just before winter. It could very well be a bad gasket that needs to be replaced as well, I guess. It's just odd that I've never pinged, installed a new induction and now I start pinging in hot weather. I cleaned the MAF and reset the computer and it didn't help. It's not the injectors either. Maybe I'll just suck it up and replace the lower intake gasket since it still uses about two quarts between changes.

Ross

 

[EliteConcept]

hey stilbo
where in NW indiana are you

i'm in Michigan city area.