1997 landrover with 4.0 engine have a problem it idles great but when you go and try to accl. it backfires through intake have change the plugs, plugwires ,o2 sensors tps, map, fuel filter, had the cat's replaced, please help I have made sure the firing order is correct and also replaced all fuel injectors still have the same problem. I was told that their is no timing adjustment PLEASE HELP this is my son's truck he needs to use it to go to tech school.

 

How many miles on the engine? Have you had a compression/leak down test done yet? You may have a burned exhaust valve.

 

Mike, the engine was sold to me as only having 70,000 miles, this morning got up and now it will not fire off at all before it always started easy and idle great it just didn't take the trottle without backfiring through the intake.

 

Start with the leaks, if you can't find anything PM me your tele number and I'll call you.

 

Update, found it had two burnt valves, I have access to the same year 1997 4.0 engine with 70,000 miles on it ,if I deside to swap the engine out is there anything that I will need to do to the electronic (ecm) or anything else. this engine i know runs great but it is sitting in a wreck Dis. and if I swap it out is land rover differant it is the same year?? please help

 

If all you are dealing with is valves, go have the heads rebuilt, when back together do a good engine flush on your next oil change and you should be fine. I wouldn't buy another engine.