95 eldorado. Car feels like it struggles/stutters at easy take offs such as 1/4 throttle up till about 2000 rpm, then it clears up. If i get on it (say more than half throttle) it also goes away. I thought bad fuel filter so I changed that with no luck (though it was nasty so im glad I did) then figured maybe plugs (which come to find out were autolite standards, so i replaced then with ac delco iridiums gapped at .50) and it still does the same thing. Im sure its related to this problem, the car seems to use alot of gas. My average mpg with my foat out of it is 10.6 mpg. Which I know for a fact is way too much. I know for a fact my IAC motor is shot, but I thought that would only make a difference at start up/idle as thats basically just a electronic choke essentialy. Im not getting any codes for the 02 sensors, but thats almost what it feels like it is. Or perhaps the octane sensor is out of wack and throwing my automatic timing changer off.
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fatboi07
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87,832 Posts
Go back and look at your recent spark plug changing post.
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87,832 Posts
The first hose is some sort of vacuum supply to something ??? Is it plugged, or does it have vacuum when the engine is running ?
The 1/2" one that's under your fingertip - is the PCV "dirty air" hose. It should connect to the PCV valve in the grommet in the passenger end of the rear cam cover. The PCV "clean air" hose comes off the TB just under your little finger and goes into the driver's inner end of the front cam cover. Dirty air is on the vacuum side, clean air is on the air filter side - of the throttle butterfly. (The MAP sensor is that crabby-looking thing with the 3-wire side connector just left of your fingertip. MAP has no hoses.) If your PCV system is disconnected then your low speed air/fuel mixtures are all screwed up and your engine is also happily eating its guts alive from sludge and acid buildup in the crankcase and chaincase. (PCV valves have different flow rates and are vehicle-specific.)
Is the broken blue wire the ICM ground ? - it's no wonder you have a miss and stutter.
The small hose in the end of the intake looks like some sort of vacuum signal - that's a guess 'cause my 02 is way different.......
You NEED a real GM service manual and vacuum diagrams - badly.
The 1/2" one that's under your fingertip - is the PCV "dirty air" hose. It should connect to the PCV valve in the grommet in the passenger end of the rear cam cover. The PCV "clean air" hose comes off the TB just under your little finger and goes into the driver's inner end of the front cam cover. Dirty air is on the vacuum side, clean air is on the air filter side - of the throttle butterfly. (The MAP sensor is that crabby-looking thing with the 3-wire side connector just left of your fingertip. MAP has no hoses.) If your PCV system is disconnected then your low speed air/fuel mixtures are all screwed up and your engine is also happily eating its guts alive from sludge and acid buildup in the crankcase and chaincase. (PCV valves have different flow rates and are vehicle-specific.)
Is the broken blue wire the ICM ground ? - it's no wonder you have a miss and stutter.
The small hose in the end of the intake looks like some sort of vacuum signal - that's a guess 'cause my 02 is way different.......
You NEED a real GM service manual and vacuum diagrams - badly.
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