Ever Heard of this?
Thread Starter
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Senior User
Joined: Feb 2008
Posts: 436
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From: Lincoln, Nebraska
Ever Heard of this?
In the summer when I run my A/C my truck looses power and seems to go into a survival mode(I picked that term up somewhere in my books). It's a 92 Flareside 4X4 with a 4.9 and a 5 spd manual. Any ideas? I have a code reader but not sure if the codes are right. Never done this before. I tried to count the blinking "CHECK ENGINE" light. I'm not even sure they told me how to hook up the code reader right.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Well when the AC compressor engages, it places a higher load on the motor so naturally you are supposed to lose some power. How much of a difference are we talking here? When's the last time you gave it a tune up?
Elder User
Joined: Oct 2006
Posts: 552
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you realize all the chain auto parts stores have actual code readers, and will scan your ecu for free, right? why bother with the ghetto-fabulous paperclip method?
if the ecu runs in open loop when you turn the ac on its probably throwing a code. "open loop", by the way, is the actual term. not survival mode.
go get it scanned and go from there
if the ecu runs in open loop when you turn the ac on its probably throwing a code. "open loop", by the way, is the actual term. not survival mode.
go get it scanned and go from there
Thread Starter
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Senior User
Joined: Feb 2008
Posts: 436
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From: Lincoln, Nebraska
The loss of power is significant. When I say "goes into survival mode", I mean if you are close to home you can limp back home. This is a major drop in power. I haven't had more than 500 miles on a tune-up. The check engine light does come on when it happens. The truck runs fine otherwise.
Thread Starter
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Senior User
Joined: Feb 2008
Posts: 436
Likes: 0
From: Lincoln, Nebraska
you realize all the chain auto parts stores have actual code readers, and will scan your ecu for free, right? why bother with the ghetto-fabulous paperclip method?
if the ecu runs in open loop when you turn the ac on its probably throwing a code. "open loop", by the way, is the actual term. not survival mode.
go get it scanned and go from there
if the ecu runs in open loop when you turn the ac on its probably throwing a code. "open loop", by the way, is the actual term. not survival mode.
go get it scanned and go from there
Elder User
Joined: Oct 2006
Posts: 552
Likes: 0
i completely understand. Im the same way. If i cant build it or make it, ill buy it lol.
I just think you should go with the reputable scanner. Its not a dash against your pride! and then youre not solving problems that dont exist and potentially hurting the state of tune of your truck for no reason!
I just think you should go with the reputable scanner. Its not a dash against your pride! and then youre not solving problems that dont exist and potentially hurting the state of tune of your truck for no reason!
