It's a Mi16 Ph1 (DFW), searching the internet, searching the forum, don't know which ones are better.

Few days ago I've put new spark plugs Eyquem F54, but I can feel the car is slower than it was with old ones - BOSCH FR7DE

Did they sell me spark plugs with the wrong heath value???

Which one do you recommend?

http://peugeot.mainspot.net/405Mi16cat.pdf

http://www.stuartmcguire.co.uk/pug/GB/405F/5/59F10A.HTM

http://krasses-auto.de/daten/Peugeot/2967_405MI_16.html

http://www.aussiefrogs.com/forum/archive/i...php/t-4501.html

http://www.globaldenso.com/en/products/aft...spec/index.html

http://www.globaldenso.com/cgi-bin/global/...;cc=&FF=200

Take a look at these few links and you'll be as confused as I am.

FR7DE should be fine. They are longlife platinum plugs & suit most of the 16V Pug/Cit engines.

Click to view attachment

I checked the NGK website www.ngkpartfinder.co.uk for the BX 16 valve engine which is the same as the alloy block Mi16. It quotes BCP7ET stock number 2078 for the non cat 1905cc through to 10/92 (3 electrodes).

BCPR7E stock number 1272 for the cat version 1905cc from 10/92 onwards (single electrode) The BX didn't get the 2 litre cat version

Some crop up on e bay from time to time

BX 16 valve owners club also show the Champion RC7YCC for the non cat engine.

Hope that helps

I find this confusing. On eyquem site http://www.eyquem.com/ they recommend RFC 58 LS3 for my XU9 J4-Z [DFW], and there you can see that eyquem F54, which they sold me doesn't go only for XU9J4 and XU9J4-Z models. From here you can also see that there is a difference between different compression ratio engines, because for the D6C they recommend RFC 62 LS3 spark plugs (I guess these are a bit colder)

But this RFC 58 LS3 that should go on my car, when I seek on the ngk site http://www.ngkntk.co.uk/working/FileLib/Mo...20Catalogue.pdf I see that equivalent for this spark plug is NGK BCPR6ET 2197, not BCPR7E stock number 1272 as you stated, so I supposed this is for the higher compression ratio engine (D6C), but when I compared RFC62LS3X (for the D6C model) I got NGK BCPR6ET, so I'm confused again

I think the best thing to do is to buy BOSCH FR7DE, with which I was satisfied, or If I don't find them, maybe EYQUEM RFC 58 LS3....

Hi I've just rechecked the NGK site, the references I gave are correct for the BX 16v XU9J4 engine, they list the same BCP7ET for the non cat 1.9 Peugeot XU9J4 engine as well. The BCPR6ET 2197 plug is shown for the catalyst version of the 1.9 Peugeot engine that I don't think was sold on the UK market as a Peugeot (it was as a BX with the BCPR7E plug)

From the engine spec the UK XU9J4 D6C engine was 10.4:1 160bhp, whist the XU9J4/Z DFW engine was 9.7:1 148bhp

If this isn't confusing enough, it gets worse when other manufacturers give equivalent grade plugs to their own.

The best approach is to go direct to the NGK, Equiem, Bosch site to see what they say. NGK dont differentiate between the D6C and DFW engines, only cat/non cat. Hope that helps

Same engines but look here:

BX16v
http://www.ngkpartfinder.co.uk/car_commerc...&engine=1.9

Mi16
http://www.ngkpartfinder.co.uk/car_commerc...&engine=1.9

And another ngk site (USA): http://www.ngksparkplugs.com/part_finder/c...suv/default.asp

Here they don't make difference between DFW and D6C

Today I bought EYQUEM RFC 58 LS3 (cause I couldn't find BOSCH) , I'll try them out as soon as the road gets dry.

They're the pages I looked up. According to the chapter 13 supplement in the Haynes manual, para 4.15 the XU9J4/Z engine was introduced in 1991 (?) and had a catalytic converter. Along with the lower compression ratio I think you should be looking at the "cat" plugs. We tend to associate the "cat" engines with the XU10 versions.

It is possible that some of the XU9J4/Z engines will have "lost" their cats along the way just to cause a bit more confusion! The other difference is the Bosch Motronic ML4.1 in the D6C using 97 octane fuel and M1.3 in the DFW using 95 octane.

Hope the Eyquem plugs resolve the issue. Good luck