406oc.co.uk

Hi there all,i came here with problems,which my saved pug coupe have.I bought him at very poor conditions and many things have been that to raise him till good car level,but a few main jobs still left.First i have to say that i dont have ability now to check with pp2000.So,here is the sympthons: enourmous fuel consumption(16l/100km),when driving and releasing throttle or changing gear after 1sec you can actually feel a small pull or something like that,other problem,when car is in neutral gear and you push throttle abd releasing it the engine vibrates hard from like 2k rpm till 1k,and rpms going down slow,and sometimes you cab feel a small pulsing when standing still.when car is driven you cant feel anything wrong except that pull.engine have his power(he starts to pull hard after 2.5~krpm),goes all the way till redline.So,basically engine works bad when standing still and works much better on higher rpms.map sensor new,lambda changed into good one,no lpg right now and im going to buy new coolant temperature sensor right now. Any ideas? Engine XU10 J4R

Oh,i forgot to mention engine : Peugeot 406 Coupe SE 2.0l 16v 97kw 1997y. XU10J4R

Just did diagnostic ,and map sensor showed numbers at neutral gear 0.450 around and when they pushed throttle it showed only 0.250 instead of 0.8-1.0 they said,thats its true? Lambda is fine.

I'm not sure you can trust map readings like that in neutral. See what it gives under load (acceleration). Because higher rpm and semi closed throttle should make for a more efficient vacuum pump (brakes should get a bit lighter as well when you blip the throttle because of more vacuum when you then close the throttle).

Remember that map gives ratio of atmospheric pressure, and a wide open throttle allows as much air in as it can take. Also check map sensor reading with the engine off, it should be 1.

under the load it shows only 0.25

The movement you notice from the engine..
Are you sure it's not a worn out mount..the back lower one that links up with drive shaft is common fail item on pugs.

Man with pp200 said ,that map sensor doesnt work properly,and everything else looks good,and the car sympthoms shows that it could be sensor fault.i saw that sensor showed only once about 0.960 when he was under the load,every other times it was not more than 0.300 and the car was struggling.it feels lack of power,poor feul economy,sometimes it looks that some cylinders doesnt work .etc....other guy said (before this one) that engine instead off 300 mili bars of air gets 480air(but he didint checked sensor because i said its good (i have bought used from friend ,because last one was dead,he said "good" ),so he said to check from where engine could get too much air,but all intake manifold gasket are changed in news ones and manifold is in a good condition,all filters new too.