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Old 04-26-2006, 02:44 PM   #1
brownmota
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1999 SL1
Wrench Rough engine start, High Idling, and Cold running engine(?)...

I am very new to this site and I have 3 problems concerning my 1999 SL2, 5-speed Manual Transmission, 150,000 mile 4-door Saturn.

1) When I go to start my engine I have to floor the accelerator in order for my car to start. In the event where I turn the ignition and do not floor the accelerator, the engine cranks and cranks but no start. This issue is erratic and lately has been happening more and more (5 times in the last 2 days). Please advise to what may be causing this (my feeling is the fuel pump).

2) Once the engine is on, it is good for me to drive. However, this is where my second problem occurs. As I drive I notice the engine revs real high; up to 3000 RPM as I change gears. If I come to a complete stop, it will rev at 3000 RPM and gradually (over a time span of about 15 seconds) rev down to 1500 RPM. Wheras before this problem, the car would idle at about 1000 RPM. ( I noticed this high revving soon after I got the thermostat housing and water pump changed about 2000 miles ago)

3) Besides this, the temperature gauge needle stays stuck at "C" (Cold) and it never moves up no matter how long the car is turned on (The longest I've had the car turned on and driven is about 45 minutes). My gut tells me that the high idling is caused by the "cold" running engine. My guess is that the computer is telling the fuel system to send more gas to the engine in order to warm the engine up to normal. Maybe this is a computer issue(?).

I recently (2000 miles ago) had the water pump changed for a new one and I also had the thermostat housing changed as well.

I'd like to take it to the dealer but I want to know what I"m getting myself into money-wise before I do.

I drive long distances in my Saturn so maybe the long trips have an affect(?). I drive about 200 miles a week and add another 1000 miles to that every 3rd week.

Thanks to anyone who helps me out with these problems.

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Old 04-26-2006, 02:56 PM   #2
Carriere
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Default Re: Rough engine start, High Idling, and Cold running engine(?)...

I am not sure if I will be the first one to tell you and I am not an expert by any means, i only know what I have learned on this site but if its a '99 I think everyone will tell you to change the old resin tipped ects with the new brass one from the dealer.

my car also Idled very high and I cleaned the egr as it was caked with carbon and that solved my high idle problem and the ects may solve your engine running at C as well as help you engine running too rich,

do you get back gas mileage?

Also after changing the ects and removing the egr for cleaning pull the pcm B fuse to reset the pcm.

thats all i know but maybe some other will concur with my thoughts and then again maybe not?

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Old 04-26-2006, 03:34 PM   #3
brownmota
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Post Re: Rough engine start, High Idling, and Cold running engine(?)...

My gas mileage is getting worse. I used to get about 30 miles to the gallon HWY, now its down to about 22 miles.

I live in the Bay Area and Saturn mechanics will charge me upwards of $300 to diagnose the problems and extra to actually fix the problems.

I know of plenty of shops down in Los Angeles where I can get it done cheaper. Do you think it would be OK if I drove my High Idling, low temp Saturn 400 miles to get it fixed? I don't want to run the risk of being F.O.R.D. (lol).

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Old 04-26-2006, 08:38 PM   #4
sunshn1972
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Default Re: Rough engine start, High Idling, and Cold running engine(?)...

Two ideas come to mind for the cold engine problem. When they replaced the thermostat housing did they also replace the thermostat?

However, I think the Engine Coolant Temperature Sensor (ECTS) is much more likely. Check the how-to section; I think the ECTS is push-pinned to the top of the list of how-to's. Make sure to replace the connector too if it's corroded.

I think if you check and replace the ECTS, some of your issues will be resolved. There may still be other problems to be resolved, but that would be a great start.


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Old 04-26-2006, 08:53 PM   #5
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Default Re: Rough engine start, High Idling, and Cold running engine(?)...

As others have posted....ECTS. There are instructions with pictures in the "How To Library" section of the board. It's about a $15 part that takes maybe 20 minutes to change.

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Old 04-27-2006, 09:01 AM   #6
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Default Re: Rough engine start, High Idling, and Cold running engine(?)...

ECTS... ECTS... ECTS.. (Engine Coolant Temperature sensor)! It very well may solve all of those problems. Cheap part, easy to do, even for someone that has no mechanical know-how. Just be sure to follow the instructions and if your connector has any corrosion on it, replace it. It can't be cleaned. I think even Autozone now sells the ECTS electrical connector, so you may not have to get that from the dealer. Get the ECTS from Saturn, though.

After replacing it, if you temperature is still low, replace the thermostat with a 195 degree one. Autozone only sells 185 degree, this is too cold.

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Old 04-29-2006, 05:55 PM   #7
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Default Re: Rough engine start, High Idling, and Cold running engine(?)...

Hi i've got the same symptons.My saturn runs cold it hardly reads on the guage at all.This has been going on for about a week.I've got to put her to the floor just to get her started and then she sends out black smoke for about a min.It seems that the temp hand and this rough start up is tied together somehow.This has been a loyal car.

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Old 04-29-2006, 07:27 PM   #8
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Default Re: Rough engine start, High Idling, and Cold running engine(?)...

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Old 04-29-2006, 07:32 PM   #9
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Default Re: Rough engine start, High Idling, and Cold running engine(?)...

Quote:
Originally Posted by eljefino

If it looks like the one on the right side of picture, it is the old one. If it looks like the center one, with a bulgy part near the flats, it is the newer one.



You can tell which one it is just by looking.

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Old 04-29-2006, 10:54 PM   #10
Jinjo
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Default Re: Rough engine start, High Idling, and Cold running engine(?)...

Yeah just be careful when changing it, coolant does come out and it's like a fountain. Have the other one ready and perhaps another person with a bucket just underneathe the hole that coolant would come out of. You could also jack up the car on the drivers side so that it doesn't come out at all. I just recently did mine to find that it had already been done by the previous owner. Oh well.

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Old 04-30-2006, 08:50 AM   #11
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Default Re: Rough engine start, High Idling, and Cold running engine(?)...

Is there a fuse for this ECTS?Mine sure looks like the old one.Can codes be taken from a 97sl1 without a code tester?

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