89 S4 Cap & Rotor - Need to Replace?
#1
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89 S4 Cap & Rotor - Need to Replace?
Car is running fine, in town mileage around 10-12 (heavy foot, lots of BWAAHHH).
PO installed new Beru wires and Bosch Plus4 plugs 20k miles ago. Wires are good and plugs a little fouled (more black than tan), but probably ok.
I looked at caps and rotors and they are a bit burned. There is no record of them ever being replaced & car has 103k miles.
My questions are these:
1. Should I go back to Bosch copper (OE) plugs?
2. Should I use only Bosch cap & rotor or are aftermarket ok? (my British cars would not run unless I used Lucas ignition components, so I'm a bit nervous here)
Thanks for any comments you care to share.
Hawk
PO installed new Beru wires and Bosch Plus4 plugs 20k miles ago. Wires are good and plugs a little fouled (more black than tan), but probably ok.
I looked at caps and rotors and they are a bit burned. There is no record of them ever being replaced & car has 103k miles.
My questions are these:
1. Should I go back to Bosch copper (OE) plugs?
2. Should I use only Bosch cap & rotor or are aftermarket ok? (my British cars would not run unless I used Lucas ignition components, so I'm a bit nervous here)
Thanks for any comments you care to share.
Hawk
#2
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"My questions are these:
1. Should I go back to Bosch copper (OE) plugs?
2. Should I use only Bosch cap & rotor or are aftermarket ok? (my British cars would not run unless I used Lucas ignition components, so I'm a bit nervous here)"
1. Bosch copper
2. Bosch not aftermarket
1. Should I go back to Bosch copper (OE) plugs?
2. Should I use only Bosch cap & rotor or are aftermarket ok? (my British cars would not run unless I used Lucas ignition components, so I'm a bit nervous here)"
1. Bosch copper
2. Bosch not aftermarket
#3
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The plugs should be tan. Your gas mileage, even with a heavy foot, is terrible for an 89. I average 17-18 including a lot of around town driving.
I've used the Plus4 and copper. I see no difference, although you will see people here who have a strong preference for copper.
I'm not sure about "aftermarket" cap & rotor. I just buy the good stuff from one of our 928 vendors. Do change the cap & rotors. Clean or replace the plugs. If they aren't tan right away, you have other problems (O2, MAF).
I've used the Plus4 and copper. I see no difference, although you will see people here who have a strong preference for copper.
I'm not sure about "aftermarket" cap & rotor. I just buy the good stuff from one of our 928 vendors. Do change the cap & rotors. Clean or replace the plugs. If they aren't tan right away, you have other problems (O2, MAF).
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#8
Drifting
I have caps and rotors made by Intermotor (UK), no problems at all, well made and significantly less expensive than Bosch.
Bear in mind that it is the OEM Bosch electronics that fails so expensively - LH ECU and Ign Amps for instance.
Bear in mind that it is the OEM Bosch electronics that fails so expensively - LH ECU and Ign Amps for instance.
#11
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I have the WR7DC plugs for $1.79 each
Bosch Rotors for $37.17 each
Bosch D/Caps for $47.95
Let me know if I can supply your parts?
Roger@928sRus.com
Bosch Rotors for $37.17 each
Bosch D/Caps for $47.95
Let me know if I can supply your parts?
Roger@928sRus.com
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
#12
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Thread Starter
The plugs should be tan. Your gas mileage, even with a heavy foot, is terrible for an 89. I average 17-18 including a lot of around town driving.
I've used the Plus4 and copper. I see no difference, although you will see people here who have a strong preference for copper.
I'm not sure about "aftermarket" cap & rotor. I just buy the good stuff from one of our 928 vendors. Do change the cap & rotors. Clean or replace the plugs. If they aren't tan right away, you have other problems (O2, MAF).
I've used the Plus4 and copper. I see no difference, although you will see people here who have a strong preference for copper.
I'm not sure about "aftermarket" cap & rotor. I just buy the good stuff from one of our 928 vendors. Do change the cap & rotors. Clean or replace the plugs. If they aren't tan right away, you have other problems (O2, MAF).
Thanks,
Hawk