- This topic has 9 replies, 5 voices, and was last updated 10 years, 3 months ago by
.
-
Topic
-
I have a 98 Saturn SL2 with a high idle issue. I replaced the ECT sensor as they’re a known common issue with these cars and are really cheap/easy. I hooked up a scanner and checked things out and the STFT’s and LTFT’s are way off. They’re pretty high in the negative so its pulling fuel and running lean which is I assume why it’s idling high. I already checked for a vacuum leak with some carb cleaner and could find any signs of one. Also the MAP reading was around 8 Hg at idle according to the scanner. Which seems low but I’m not sure. Any ideas help is appreciated!
-
Replies
-
Yes, the intake gasket tends to go at the number one cylinder, or at least that was where mine went. The idle will change when you get to the leak.
Use Throttle Body cleaner, not Carb cleaner. Then you can use the leftovers to clean your intake manifold and intake ports when you replace the gasket. Also the EGR passages probably need a scraping, another use for throttle body cleaner.
I sprayed directly where the intake meets the head and anything spots where a vacuum leak could occur. Parts cleaner worked perfectly fine on the gf’s car to diagnose the intake gasket I don’t see why it should be any different(it’s a newer Saturn).
[quote=”moorejr1989″ post=117468]I didn’t come here for link to a pay site, thanks for your spam.[/quote]
If your referring to the link I posted its free info for your problem not a pay site.
That reading is 30-8= 22 in. vacuum. You’re correct, they were bad for coolant sensors and the sensor connector. They were also bad for o2 sensors especially the ones with a 9/16 in hex. I suggest that you connect a volt meter and check the o2 sensor voltage to see if it’s switching between .2 to .8 volts. Be sure the coolant is full with no air pockets.
It could have other issues but getting the fuel trims in line is a good place to start.
The scantool I have is capable of testing the 02. When I did the reading was a constant .5 volts just about.
- You must be logged in to reply to this topic.