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General Information => Troubleshooting => Topic started by: dave friday on June 09, 2009, 08:14:04 pm

Title: injection pump
Post by: dave friday on June 09, 2009, 08:14:04 pm

hi all,anyone know what causes the engine revs to go up and down [just above idle 1000/1200 rpm].
ta.

Title: Re: injection pump
Post by: rabbitman on June 09, 2009, 11:20:11 pm

Make sure all the IP mounting bolts are tight and that the brackets aren't cracked.

Title: Re: injection pump
Post by: dave friday on June 10, 2009, 03:05:30 am

thanks for that,the fixings are all ok,it could be a mis-fire as the engine shakes a bit [i know of two other vans with the same problem!], my knowledge of injection pumps is a bit limited,could it be sucking air at those revs? [ i p drive shaft has a bit of radial play ].

Title: Re: injection pump
Post by: rabbitman on June 10, 2009, 12:53:31 pm

Yes, air can cause missing.

A clear fuel hose feeding the IP would let you see if there's bubbles.

Title: Re: injection pump
Post by: airhead on June 11, 2009, 09:13:30 am

Mine does this a little bit too when its warming up but seems to stop once it gets up to operating temperature. I dont worry about it.

Title: Re: injection pump
Post by: Rabbit TD on June 11, 2009, 03:24:56 pm

Quote from: rabbitman on June 10, 2009, 12:53:31 pm

Yes, air can cause missing.

A clear fuel hose feeding the IP would let you see if there's bubbles.

Where in the world does a person get that clear hose at anyway.  Tractor Supply has some that says "Chemical Reistant" and I've been tempted to try it, what does anybody think about this?

Title: Re: injection pump
Post by: BlastIt on June 12, 2009, 05:24:59 am

Auto parts store can get it for you. Some carry it in stock. Just tell them you need clear fuel line. They should
be able to hook you up.