Chevrolet Repair: 94chevy cavilier, throttle position sensor, coolant temp

Question
im fixing my friends moms car and she says it she warms it up 15 mins or more than she puts it in reverse to back up it sputters than stalls she starts it up again and its fine she begins to drive and she says it kinda bogs i think it might be the egr valve so i dove the car around and it didnt do nothing to me so i am kinda stuck so let me kno what u i really apreshate  it thank you

Answer
Hi Modie,
It sure could be the EGR. It could also be the coolant temp sensor, the throttle position sensor, or low fuel pressure....dirty filter, or worn pump.


Go to this forum, and scroll down to Chevytech's post with the coolant temp sensor chart.
http://www.chevytalk.org/fusionbb/showtopic.php?tid/116045/

I am fixitfox33 on that forum.
If you would like to sign up, it is totally free, and very useful.
Use this link.
http://www.chevytalk.org/fusionbb/index.php?referral/23610/


Van

"Quote"
The temp sender is very important at all times. If the temp sensor is in error, telling the computer the temperature is warmer then it really is at start up, it would be like not having the choke closing enough on a carbureted engine.
These specifications are from a 1993 light truck fuel & emissions manual. The specifications are the same for many different engines ? coolant sensors.

Coolant sensor resistance specifications:
177 ohms @ 212 deg. F. or 100 deg. C.
241 ohms @ 194 deg. F. or 90 deg. C.
1802 ohms @ 95 deg. F. or 35 deg. C.
2238 ohms @ 86 deg. F. or 30 deg. C.
2796 ohms @ 77 deg. F. or 25 deg. C.
3520 ohms @ 68 deg. F. or 20 deg. C.
4450 ohms @ 59 deg. F. or 15 deg. C.
5670 ohms @ 50 deg. F. or 10 deg. C.
7280 ohms @ 41 deg. F. or 5 deg. C.
9420 ohms @ 32 deg. F. or 0 deg. C.
12300 ohms @ 23 deg. F. or -5 deg. C.
16180 ohms @ 14 deg. F. or -10 deg. C.
21450 ohms @ 5 deg. F. or -15 deg. C.
28680 ohms @ -4 deg. F. or -20 deg. C.
52700 ohms @ -22 deg. F. or -30 deg. C.