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Frango100 04-08-2010 05:07 PM

Dip in acceleration
Hi guys,

My WJ is having some problems lately. When accelerating, there is a dip in power around 3000 rpm. Also the fuel consumption is higher then before. Checked spark plugs, all look ok. Can it be a fuel pressure problem? (fuel pump or filter/regulator?).

josef15111 04-08-2010 05:54 PM

Re: Dip in acceleration
try your o2 sensors the up stream ones " ones comeing from the maifolds before the cats" they could be starting to act up on you and they will cause performance problems when going out.

Frango100 04-09-2010 03:41 PM

Re: Dip in acceleration
Is there any way to measure them?

scjeep4.7HO 04-09-2010 08:28 PM

Re: Dip in acceleration
how many miles? O2's can cause loss of mileage and power loss too. What motor?

Chaoul1 04-09-2010 08:33 PM

Re: Dip in acceleration
He has a 4.7L.

Frango100 04-10-2010 01:28 PM

Re: Dip in acceleration
My GC is indeed a 4.7L and has now 109.000 Km on the clock. Acceleration at city speeds seems to be normal, the problem is only noticeable at highway speeds.

josef15111 04-11-2010 11:34 AM

Re: Dip in acceleration
i would give the seafoam a go. let your 4.7 inhale some thro the power brake booster vacum hose. do about half a can and put the rest in the tank. it will do wonders for you. and its easy just make sure youdont let it suck in fast do it rather slow..

Frango100 04-11-2010 03:20 PM

Re: Dip in acceleration
Never heard about this seafoam. Is it a brand? I live in Brazil, any cleaner which goes through the inlet will do?

scjeep4.7HO 04-11-2010 09:21 PM

Re: Dip in acceleration
Seafoam is the brand name. Comes in a can.

josef15111 04-12-2010 11:10 AM

Re: Dip in acceleration
yes its a brand name like mention above. look for SEAFOAM white can i beleave with a little white lid and red letters i think. look for it at your autoparts stores im not familar with brazil lol

hope this helps


Unholyskorn86 04-13-2010 11:38 AM

Re: Dip in acceleration

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