Electrical Problem...Bad FP?!?
Thread Starter
Registered User
Joined: Oct 1999
Posts: 17
From: Ontario,Canada
Electrical Problem...Bad FP?!?
Would a bad fuel pump cause a voltage drain in the electrical system? I'm testing 12V at the battery and 12V at the alternator with the car running...it should be about 14V while in park. The alternator is a year old or less and just to rule out the battery, I swapped in a known good battery from the Sunfire, and the battery seems to be fine. I'm at a loss here right now. The car is hard to start after sitting for a while so this is why I'm wondering about the FP. Once started the car appear to work fine, idle is smooth.
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1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, MSD Super Conductor wires and Blaster Coil, Energy Suspension polyurethane bushings for LCA and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, Ported Plenum, Holley AFPR, CarSound Hi-flow Cat into 3" Mandrel-bent pipes, Flowmaster muffler, Vette Servo, TransGo Shift Kit, Vette 2000 Stall, TruCool LPD tranny cooler, T-tops.
Dynoed: 207HP and 304lbs-ft
1/4 Mile: 14.7s @ 95MPH
2001 Sunfire GT
2.4L, 5-speed, K&N cone filter, interior and engine detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.
Web: http://www.angelfire.com/on3/whitelightening
------------------
1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, MSD Super Conductor wires and Blaster Coil, Energy Suspension polyurethane bushings for LCA and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, Ported Plenum, Holley AFPR, CarSound Hi-flow Cat into 3" Mandrel-bent pipes, Flowmaster muffler, Vette Servo, TransGo Shift Kit, Vette 2000 Stall, TruCool LPD tranny cooler, T-tops.
Dynoed: 207HP and 304lbs-ft
1/4 Mile: 14.7s @ 95MPH
2001 Sunfire GT
2.4L, 5-speed, K&N cone filter, interior and engine detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.
Web: http://www.angelfire.com/on3/whitelightening
Registered User
Joined: Jun 2001
Posts: 1,209
From: TX
If the fp was sucking down enough current to draw down the system, it would pop a fuse. The only reliability problem I've had with my 89 Formula is the alternator. I'm on #4 in 5 years. I've learned to keep an eagle eye on the voltmeter. Luckily I got a lifetime warranty on it.
12v at the alternator is no good; pull it and have it tested.
12v at the alternator is no good; pull it and have it tested.
Registered User
Joined: Sep 2002
Posts: 2
From: JOPLIN MO. U.S.A.
<font face="Verdana, Arial" size="2">Originally posted by IROCKER:
Would a bad fuel pump cause a voltage drain in the electrical system? I'm testing 12V at the battery and 12V at the alternator with the car running...it should be about 14V while in park. The alternator is a year old or less and just to rule out the battery, I swapped in a known good battery from the Sunfire, and the battery seems to be fine. I'm at a loss here right now. The car is hard to start after sitting for a while so this is why I'm wondering about the FP. Once started the car appear to work fine, idle is smooth.
</font>
Would a bad fuel pump cause a voltage drain in the electrical system? I'm testing 12V at the battery and 12V at the alternator with the car running...it should be about 14V while in park. The alternator is a year old or less and just to rule out the battery, I swapped in a known good battery from the Sunfire, and the battery seems to be fine. I'm at a loss here right now. The car is hard to start after sitting for a while so this is why I'm wondering about the FP. Once started the car appear to work fine, idle is smooth.
</font>
Thread Starter
Registered User
Joined: Oct 1999
Posts: 17
From: Ontario,Canada
Angel71RS: The funny thing is I usually keep an eye on all my gauges. It just seemed to happen all of a sudden. Since it's not the battery, then I will have to get the alternator tested for sure. It still doesn't explain the hard start though.
cap84Z28: The starter is good and crank over no problem. I checked the ground and it seems to be a nice tight and clean connection.
------------------
1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, MSD Super Conductor wires and Blaster Coil, Energy Suspension polyurethane bushings for LCA and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, Ported Plenum, Holley AFPR, CarSound Hi-flow Cat into 3" Mandrel-bent pipes, Flowmaster muffler, Vette Servo, TransGo Shift Kit, Vette 2000 Stall, TruCool LPD tranny cooler, T-tops.
Dynoed: 207HP and 304lbs-ft
1/4 Mile: 14.7s @ 95MPH
2001 Sunfire GT
2.4L, 5-speed, K&N cone filter, interior and engine detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.
Web: http://www.angelfire.com/on3/whitelightening
cap84Z28: The starter is good and crank over no problem. I checked the ground and it seems to be a nice tight and clean connection.
------------------
1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, MSD Super Conductor wires and Blaster Coil, Energy Suspension polyurethane bushings for LCA and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, Ported Plenum, Holley AFPR, CarSound Hi-flow Cat into 3" Mandrel-bent pipes, Flowmaster muffler, Vette Servo, TransGo Shift Kit, Vette 2000 Stall, TruCool LPD tranny cooler, T-tops.
Dynoed: 207HP and 304lbs-ft
1/4 Mile: 14.7s @ 95MPH
2001 Sunfire GT
2.4L, 5-speed, K&N cone filter, interior and engine detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.
Web: http://www.angelfire.com/on3/whitelightening
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