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Question

I have a 2000 firbird v6 3800 motor,, it started running real bad Idle is rough, and the car has gotton "hot" even though I took out the themostat, I have three errors on the ODB reader,,

P1515 Manf. cotrol Veh spd ( aux Input )
PO480 Cooling Fan 1
PO481 Cooling Fan 2

the fan relays are pluged in and I check the fusses in both boxes under the hood.
and help ?
craig

Submitted: 285 days and 19 hours ago.
Category: Pontiac
Value: $9
Status: AWAITING EXPERT REPLY
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Answer

let me get some info but to start your car will always overheat without the thermostate

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Expert: car tech
Pos. Feedback: 95.0 %
Accepts: 275
Answered: 6/8/2009

ASE Certified Technician

25 years master tech and shop owner

285 days and 15 hours ago.

Reply

OK, it overheated and I put a new one in and got the same results, Over Heated,,so I thought it was getting stuck so I just took it out, how does it work ? back pressure? I thought with it out it was like a open pipe, that would just let the water go by making it colder than it should be.

I have check a couple of other things, I have 3 additional lites on the dash at this point,
"Engin power Reduced" maybe because it is getting hot?
ABS INOP
Brake ( as if the parking break is on but it is not )

In check the fuses I found 2 things that seem "wrong"
on the ABS fuse (25 smp) I see only 10.2 Volts but all other fuse have 12.6 to ground.

on the 10 amp (fan cont) fuse smaller type fuse in box closer to the firewall I only have 1.3 volts to ground on the side that I would expect to have the same 12.6 to ground.

Seem that the Idle is a little better after letting the car run ( had to stop because it got hot again.

thanks but still need more help
craig

Posted by car tech 284 days and 17 hours ago.

Info Request

database is down i will opt out and let another guy try to help

284 days and 4 hours ago.

Reply

Relist: I still need help.

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