Hello,

Got a 1994 D1 97K

So I had a throttle body leak using up a tank's worth of coolant every couple of days. I bypassed the hoses as DiscoMike had talked about in a previous post and everything has been well. No more coolant loss. In the mean time MPG was like 6-7mpg with the leak, down from 12mpg. Now mileage has gone back up to about 10mpg. I did a good seafoam, lots of smoke etc. I pulled a couple of plugs and they are caked in carbon deposit. The plugs are bosch platinums with about 8k miles on them. Should I replace the plugs now with only 8k miles on them? Try to clean them? The seafoam didn't seem to remove much of it but I guess burning a 1/2 gallon of coolant every 2 days didn't help either. THoughts?

RM

 

If the plugs are fouled then you either need to clean them or replace them.

 

I have had nothing but problems with bosch spark plugs. Longevity and MPG issues mostly. I would change the plugs out.

 

what kind of plugs do you like? Are they worth cleaning?

 

The regular platinum plugs are junk. Go back to the stock Champions or get the Bosch +4 platinums

 

^^ champs

 

Denso Iridiums.

 

either NGk or denso iridiums.

i hate bosch plugs,,,

 

I am running Bosch Platinum +4s and love them. My mileage has increased with the +4s and Magnecor wires. After talking to Disco Mike over the weekend I finally got up the nerve to do the Seafoam induction cleaning. It smoked like a house on fire which I'm sure my neighbors loved but it didn't effect my plugs. Only change I have noticed so far is that my idle is super smooth. Sitting at a stop light you almost can't feel the engine running.