"Service Engine Soon" light under hard acceleration
Overdrive Member
Joined: Nov 2006
Posts: 4,042
From: IL
RE: "Service Engine Soon" light under hard acceleration
Scan it yourself -- my guess is the EGR being intermittent -- I got a similar code and scanned w/my AutoXray EZ-Scan 6000 '95 3.4L -- intermittent and sometimes goes on under hard acceleration:
77 EGR number 3 solenoid failure was the exact error.
Get this scanner, check ebay for a decent price:
http://www.autoxray.com/product_detail.php?pid=94
77 EGR number 3 solenoid failure was the exact error.
Get this scanner, check ebay for a decent price:
http://www.autoxray.com/product_detail.php?pid=94
In the Staging Lanes
Joined: Apr 2008
Posts: 75
RE: "Service Engine Soon" light under hard acceleration
GM put in a half-assed OBD2 in a few cars for some reason that wasn't quite OBDII and wasn't quite OBDI and all-around just sucks *** for those of us stuck with it. The reader you need is really expensive and not many places have it- the auto stores around here that offer free scanning sure don't. You might be best off just going to the dealer if you can't find one. Or failing that, just start replacing likely culprits- you can replace the O2 and MAF sensors for the price of a scanning and stand a good chance of fixing the problem.
OR... you can just ignore it. The SES isn't called the "ignore me" light for nothing
So long as the engine's running OK and you don't see a change in mileage, I wouldn't sweat it.
I was having a similar problem with my 94, only in my case, the SES light came on occassionally while braking on the highway after heaving accelleration. Would always go off again, usually while still driving. I drove like this for 3 years before finally changing the 02 sensors last week- problem went away.
OR... you can just ignore it. The SES isn't called the "ignore me" light for nothing
So long as the engine's running OK and you don't see a change in mileage, I wouldn't sweat it.I was having a similar problem with my 94, only in my case, the SES light came on occassionally while braking on the highway after heaving accelleration. Would always go off again, usually while still driving. I drove like this for 3 years before finally changing the 02 sensors last week- problem went away.
In the Staging Lanes
Joined: Sep 2007
Posts: 54
From:
RE: "Service Engine Soon" light under hard acceleration
I experienced the same condition as reported by "libertyforall1776". I have a 95 3.4 as well and it turns out the same trouble code under the same conditions. 77-EGR #3 solenoid failure. He advised me to get the autoxray scanner, and I did, only I got the 5000 model instead of the 6000. Now I'm hoping to clean the EGR valve carefully and replace it to see if it will solve the problem. You might try the same thing and see what happens. In any event, having that scanner will save you a lot of money and headache. Not only does it read your ECM in a "KeyOnEngineOff" mode, but also a "KeyOnEngineOn" mode so you can snapshot the moment a fault occurs. It will tell you more stuff than you will ever understand
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