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  #1  
Old 11-05-2010, 06:23 PM
tilley101 tilley101 is offline
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Join Date: Nov 2010
Posts: 2
Question Rough Idle Please Help

Hey my names lacy(guy) new to the foum just picked up a 96 ranger 4x4 4.0 5speed

im having the following symptoms
dtc1151 and 1443
when starting cold
Rough idle
Random high idles around 2k 2.5k

the idle sound like a vaccum leak but i check all hoses. I no i had a bad hose going to the egr vac solenoid and a bad solennoid. replaced helped but not fixed.
no i hear a nice sucking from under the upper intake all hoses looked to be alright i wiggle etc.
-When i snap the throttle you can hear it make a shoooop sucking sound. To me sounds like its in the back middle ish is this a normal sound?

What you think upper inake cracked? (its plastic)
gasket?
Could a valve cover do this?

Let me know

Ive been workin on cars for few years just engine performance isnt my bag
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96 Ranger
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  #2  
Old 11-06-2010, 04:29 PM
tiredtruckfixerupper tiredtruckfixerupper is offline
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Default Re: Rough Idle Please Help

check the vacuum hose under the plenum (butterfly valve)
the shoop is the motor sucking in fresh air. if you listen closely its probably coming from the airbox
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  #3  
Old 11-08-2010, 06:35 PM
tilley101 tilley101 is offline
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Default Re: Rough Idle Please Help

The sound is coming from the back of the plenum. I check the hose going to booster and another hose going to the intake. im possibly thinking cracked upper intake(its plastic is it common(i can feel a line under the middle port but not sure if its just a ridge in the plastic or cracked? gasket?
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  #4  
Old 11-12-2010, 01:25 PM
Giangrosso Giangrosso is offline
97 ranger
 
Join Date: Apr 2010
Posts: 106
Default Re: Rough Idle Please Help

sry it took me so long to reply, but my pressure is 36 with koeo, and 40 with koer, i dont what to do next, spark plugs and wires?
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intake, leak, ranger, vaccum

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