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Old 10-12-2019, 01:25 PM   #1
ForceEdge
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Default 99 Saturn SL2 engine hesitation, now wonít start

I was driving and the engine started hesitating almost feeing like it was going to stall. So I pulled over and turned the car off. Now it wonít turn back on. Car turns over but never starts.

Any idea what the issue could be?

Having it towed to house now with AAA

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Old 10-12-2019, 02:42 PM   #2
SRGW
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1997 SL1
Post Re: 99 Saturn SL2 engine hesitation, now wonít start

Two things to check: 1 Do you hear the fuel pump run for 3 seconds when you turn key on?
Check fuel pump relay for 12 volts. 2 Possible CPS [crank position sensor] bad. Check if plugs are wet with fuel. Check for spark remove 2 plug wires from 1 coil and crank no spark jump CPS is bad.

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CHECK YOUR OIL!!

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Old 10-12-2019, 04:12 PM   #3
ForceEdge
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Default Re: 99 Saturn SL2 engine hesitation, now wonít start

Quote:
Originally Posted by SRGW View Post
Two things to check: 1 Do you hear the fuel pump run for 3 seconds when you turn key on?
Check fuel pump relay for 12 volts. 2 Possible CPS [crank position sensor] bad. Check if plugs are wet with fuel. Check for spark remove 2 plug wires from 1 coil and crank no spark jump CPS is bad.

1995 SL1 236,300 2005>2018
1997 SL1 78,600 2014>????
CHECK YOUR OIL!!
Okay I will check fuel pump thatís an Easy one it sounds like.

If the plugs are wet with fuel that means the CPS is bad?
Also, so I have to remove one spark plug wire from a spark plug and see if thereís a spark when I try to turn the engine on? Maybe Iím not understanding this correctly?

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Old 10-12-2019, 08:10 PM   #4
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1998 SC2
Default Re: 99 Saturn SL2 engine hesitation, now wonít start

With no CPS signal there will be no spark and no fuel, because the ECM can't tell the motor is spinning.

...
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'99 SL2, 5SP bought new
Rebuilt at 204,067 September 2017
Engine, subframe, diff pin mod, brake lines, headliner, alternator, and so on!
'98 SC2, 5SP bought 2018

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Old 10-12-2019, 09:30 PM   #5
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Default Re: 99 Saturn SL2 engine hesitation, now wonít start

The fuel pump will still prime the system for the first 3-5 seconds of KOEO, the PCM just won't fire the injectors. There's a test port in the IPJB to probe with a 12v light which will light up when the fuel pump is commanded on.

Checking for spark usually takes 2 people, one to turn (and hold) the key to 'start' and another one to hold the side of a removed spark plug (plugged back into the plug wire) to an unpainted metal surface on the engine. You could run a 16awg wire with an alligator clip on both ends from the purple wire on the starter to the + on the battery and just leave the key in run if you don't have a second person.

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Old 10-13-2019, 09:27 AM   #6
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Default Re: 99 Saturn SL2 engine hesitation, now wonít start

You can also use a spare plug, connect the wire, and use a jumper cable to both make ground and hold the plug so you can see it under the hood.

...
Bryan Cotton
'99 SL2, 5SP bought new
Rebuilt at 204,067 September 2017
Engine, subframe, diff pin mod, brake lines, headliner, alternator, and so on!
'98 SC2, 5SP bought 2018

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