Service Engine Soon and loss of power
04-24-2017, 07:55 PM
#1
Racer
Thread Starter
Service Engine Soon and loss of power
Hi Everyone,
1989 L98 104K. Runs very good, one small issue: When cruising at light throttle on the highway (around 65MPH) once in a while i will have about a 1-2 second dip in power and then the Service Engine Soon light comes on and the power returns. If i step on the gas the light goes away, and if i take my foot off the gas the light goes away too.
Any ideas? I was thinking fuel pump or O2 sensor???
Help and THANKS as always!
C
1989 L98 104K. Runs very good, one small issue: When cruising at light throttle on the highway (around 65MPH) once in a while i will have about a 1-2 second dip in power and then the Service Engine Soon light comes on and the power returns. If i step on the gas the light goes away, and if i take my foot off the gas the light goes away too.
Any ideas? I was thinking fuel pump or O2 sensor???
Help and THANKS as always!
C
Last edited by cormorant71; 04-24-2017 at 07:56 PM.
04-24-2017, 09:35 PM
#2
Intermediate
Member Since: Apr 2014
Location: Phoenix AZ
Posts: 40
Likes: 0
Received 0 Likes
on
0 Posts
Check the fuel pressure. Should shoot up to 40 psi and not drop more than 20 psi in 20 minutes.
I just replaced my pump on my 86 and it looked like it was melting from age sitting in gasoline all the time.
I just replaced my pump on my 86 and it looked like it was melting from age sitting in gasoline all the time.