How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Matt Your Own Question
Matt
Matt, Mechanical Engineer
Category: Ford
Satisfied Customers: 21995
Experience:  BEng hons Mech engineering, in auto industry 22 years
12772297
Type Your Ford Question Here...
Matt is online now

My van has just started to judder a bit when accelerating

Resolved Question:

hi
my van has just started to judder a bit when accelerating - dtc that iv got is p02a0 cylinder 2 restricted
Submitted: 2 years ago.
Category: Ford
Expert:  Matt replied 2 years ago.
Hello

I'd 1st check the connections to the EGR valve, if either the vacuum pipe of electrical connection are damaged / corroded then the EGR can be on all time which certainly will hurt performance. Its also possible that its a fault with the EGR valve so its worth removing the valve and cleaning it out with brake cleaner, if it looks particularly clogged then replace it.

it could also be an injector (no. 2?) leaking fuel back through the overspill pipe, so not getting enough fuel pressure to tell ECU to fire the injectors, this is trickier to find and you’ll need the garage to do a ‘run back’ test to identify which one is the issue
Matt and other Ford Specialists are ready to help you
Customer: replied 2 years ago.

Hi sorry for delay had to get away from this rain - a bit wet around injectors - would that give the judder I discribe -you were right about egr it wasn't connected but the judder is still there

Expert:  Matt replied 2 years ago.
Hello Kev

If its wet around the injectors then this could be an airleak after the airflow meter, any air dragged in here isn't 'seen' by the ECU and so not compensated for causing rough running.

As its a mechanical fault it tends not to turn on the fault light and you can sometimes hear a 'hissing' noise with the engine running.

Check the hose clips for tightness and inspect the trunking for any cracks or splits and also all the vacuum system, the small bore pipes and fittings for cracks and missing parts.

The best way to locate a leak is to have the engine running and warm and then spray lighter gas /propane around each joint in turn. If the engine rev's up you've found your leak.

Now you might think that spraying lighter gas around a hot engine isn’t wise, however the flash /ignition point of gas is about 400°C so you need a naked flame or spark to set it off and I’ve used this method for many years without incident.

Work your way through each possible joint one at a time and you should find it. I use a slightly flattened piece of brake pipe and some rubber hose from the can of lighter gas to provide a spraying 'wand' and allow a direct blast of gas into each area, especially those difficult to reach with large implements.