92 3.0 idle
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
short answer NO.
research OBD1 engine control systems. computer totally controls engine idle rpm based upon air temp, coolant temp and other parameters it monitors.
if the engines dies at idle or lopes, there is a problem. usually component failure
research OBD1 engine control systems. computer totally controls engine idle rpm based upon air temp, coolant temp and other parameters it monitors.
if the engines dies at idle or lopes, there is a problem. usually component failure
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
idle rpm should be about 750. look up the specs on the 3L engine
computer and Idle Air Control valve will maintain correct spec'd idle w hvy alternator, a/c and in drive load with brake on if all the components are functioning correctly.
you make have a crudded gooped up throttle body plate and/or a malfunctioning plugged up IAC
any codes, many codes do not set a CEL?
3L's usually idle purr like kittens. can hardly hear my 4L idle, have hit the starter when it was already running.
if it has a replacement import alternator, then alternator idle output is often nill or very low because of the low grade recycled copper garbage the Chinese call copper wire. many of them barely put out 50 amps at 3000 rpm.
computer and Idle Air Control valve will maintain correct spec'd idle w hvy alternator, a/c and in drive load with brake on if all the components are functioning correctly.
you make have a crudded gooped up throttle body plate and/or a malfunctioning plugged up IAC
any codes, many codes do not set a CEL?
3L's usually idle purr like kittens. can hardly hear my 4L idle, have hit the starter when it was already running.
if it has a replacement import alternator, then alternator idle output is often nill or very low because of the low grade recycled copper garbage the Chinese call copper wire. many of them barely put out 50 amps at 3000 rpm.
Thread Starter
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Freshman User
Joined: Oct 2004
Posts: 32
Likes: 0
The problem is the idle is just to low and just drove it about 4000mi round trip and it ran great no idle issues or anything.Been back home for a month or two and now all of of sudden just idles lower but still runs great.
Could this be a possible vacume leak or maybe I should try and reset the ecm?
Thanks for the help
BTW prior to leaving for chicago I replaced the air filter,fresh oil change,throtle body thoroughly cleaned,MAF cleaned,fuel filter about 10,000mi.
Could this be a possible vacume leak or maybe I should try and reset the ecm?
Thanks for the help
BTW prior to leaving for chicago I replaced the air filter,fresh oil change,throtle body thoroughly cleaned,MAF cleaned,fuel filter about 10,000mi.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
unplug the IAC electrical plug. idle should drop to point engine dies.
will tell you if IAC is working, may still be partially plugged
will tell you if IAC is working, may still be partially plugged
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Elder User
Joined: Dec 2006
Posts: 830
Likes: 0
From: Kitchener,Ontario,Canada
Maf sensor could still need cleaning.
Check fuel pressure at idle speed should be about 35PSI.
Pull off a vacuum tube & see if idle speed increases.
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Posting Guru
Joined: Jul 2004
Posts: 2,416
Likes: 1
From: Mitchell, SD
The problem is the idle is just to low and just drove it about 4000mi round trip and it ran great no idle issues or anything.Been back home for a month or two and now all of of sudden just idles lower but still runs great.
Could this be a possible vacume leak or maybe I should try and reset the ecm?
Thanks for the help
BTW prior to leaving for chicago I replaced the air filter,fresh oil change,throtle body thoroughly cleaned,MAF cleaned,fuel filter about 10,000mi.
Could this be a possible vacume leak or maybe I should try and reset the ecm?
Thanks for the help
BTW prior to leaving for chicago I replaced the air filter,fresh oil change,throtle body thoroughly cleaned,MAF cleaned,fuel filter about 10,000mi.
Then if the issue is still present, we will check out other avenues.
