1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Bosch in Past Cadillac Vehicle Discussion; It's tune up time for the 90 DeVille. This is the first tune up since I had the car. I ...
- 11-11-03 11:12 PM #1
It's tune up time for the 90 DeVille. This is the first tune up since I had the car. I want to know if Bosch products are any good on this particular car. I've heard many different opinions about how they make the car act. I got the spark plugs and the oxygen sensor. The guy recommended that I get the Bosch Platinum plugs over the AC Delco because they were better. They were priced the same, but what do you all think about this?
- 11-12-03 12:34 AM #2Cadillac Owners Member
- Join Date
- Jun 2003
Re: BoschOriginally Posted by HollywoodHicks1
get the rapid fire plugs. i put the bosch Platinum 4 plugs on my 94 Cavalier, and they made my car miss fire cause u couldn't gap the plugs correctly. that was my experience with bosch plstinum 4 plugs. the reason i like the ac delco is cause they are made by GM. My 2 cents
- 11-12-03 12:45 AM #3
Man that is what I was gonna do in the first place. I wanted to get those Rapidfire ones, but the guy gave me every reason in the world to get the Bosch. I didn't argue with him because (1) he knows more than I do and (2) they were priced the same. Thanks for the help!
- 11-12-03 07:55 PM #4
I own a 90 deville, it has 198,000 miles on it and has always been meticulously maintained and I have been running Bosch plugs in it for ever and have never had a problem with it, it still gets great mileage and runs smooth (for a 90 4.5)
- 11-13-03 12:31 AM #5
Alright Jack. You just slightly have a few more miles than I do, and if they work with you, I'll take a risk and see how they come along. I'll just keep the plugs and put them in. Thanks a lot.
- 11-13-03 12:34 AM #6Cadillac Owners Enthusiast
- Automobile(s): 1995 Sedan De Ville (4.9 L)
- Join Date
- Oct 2003
- Woodridge, Illinois
I had AC Delco Pt plugs in my 4.9 L when I bought the car.
They were there for 20K miles according to the previous owner.
I believe they are supposed to be good for 100K or so, but
some of them looked already worn, although the car was
running fine. So, I chenged to Bosch Pt plugs, which are the
conventional, one electrode type. Maybe I am not too sensitive
(My nose is very sensitive, though), so I didn't feel any
change in performance, but I DID notice that the car starts
- 11-13-03 12:56 AM #7Cadillac Owners Master
- Automobile(s): 1991 Cadillac Brougham D'Elegance 5.7 Litre
- Join Date
- Jun 2003
What I don't like about the AC delco sparkplugs is that the washers don't stay on them like most plugs. But I don't know if those engines use the plugs with the washers or not. I think that would probably be even worse on those enignes when you can't even see the back.
- 11-13-03 01:13 AM #8
I put in the Bosch plats (not 2 or 4's) one month ago. It runs great, but I notice slightly less mileage. It might be due to the fact it is getting colder, and dense air tends to burn more. Don't ask me to repeat the words I used getting the last two plugs out on firewall/passenger side!
- 11-13-03 01:13 AM #9
No problem, I am glad I could help, if you have anymore questions about your 90 lemme know, I have owned mine since 92 and seen a few problems!
- 11-13-03 01:21 AM #10
Hey, did you try getting to those plugs you were talking about from the bottom using about a 1 1/2 or 2 foot extension with a universal on it? Thats the way I always do mine and I get 3 from the bottom and then the 1 behind the tranny dipstick from the top without an extension just a universal.
- 11-13-03 01:35 AM #11
Re: BoschOriginally Posted by CadillacJack76
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