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Car Forum / Ford / Ford Explorer / September 20061999 Explorer clacking sound
Hi folks, I have a 1999 Explorere with 118,000km on it. 4.0L engine. Lately have been noticing a bit of clacking when under load such as entering an uphill grade when on cruise. Sounds almost like rocker arm clack like in some of the older straight six engines. No problem with power, kicks down fine on steeper hills. Also, don't know if it's related, sometimes when starting, usually after it's warm, engine will almost dye out then catch again and come up to proper idle. Anyone with some ideas? Thanks Allan Engine running to lean ??? pinging Replaced fuel filter @ the intervals it suppose to be replaced ??????????? Or 1 of the other 50 reasons that can cause a pinging engine check engine light on ????????? > Hi folks, > [quoted text clipped - 11 lines] > > Allan I ran into our local mechanic today, we only have the one in our small town, he corrected my use of clanking to pinging. He did say exactly what you are saying and also asked if check engine light was on. No, the check engine light is not on. He said it could be the fuel filter but was unsure. We tried to duplicate it at the time but putting the unit in gear, stepping on the brake and putting it under load, but no pinging sound rose. Seems to do it more when up to operating temperature when travelling but then only when going up a grade. From a dead stop, no ping. Being in a farming district with alot of gravel roads, it does get very dusty so I plan to bring it in next week for servicing. Can't hurt. Thanks Allan > Engine running to lean ??? pinging > [quoted text clipped - 19 lines] >> >>Allan Is this the SOHC 4.0L engine? If so then it could be the timing chain tensioners. As I said in the post a few below there were extended warranties on this engine w.r.t. timing chain noise, etc., depending on your mileage. Check with a Ford dealer. As for the starting issue this is usually caused by a dirty IAC, you may need to clean or replace it. See: http://www.ford-trucks.com/article/idx/0/170/article/Ford_Explorer_IAC_Fix.html  SignatureAllan Williams > Hi folks, > [quoted text clipped - 11 lines] > > Allan Hi Al, Thanks for the reply. As I said in a previous reply to another gentleman that I ran into our local mechanic today, he did say that the starting issue was related to the IAC, although he pointed out another component that was on the air cleaner intake hose and said this could be the cause. Going to bring the unit in for service next week, it's due. Been pretty much trouble free since we bought it, other than replacing the front driver side hub at 100,00km. Thanks Allan > Is this the SOHC 4.0L engine? If so then it could be the timing chain > tensioners. As I said in the post a few below there were extended [quoted text clipped - 5 lines] > > http://www.ford-trucks.com/article/idx/0/170/article/Ford_Explorer_IAC_Fix.html Not sure why, but the last 2 Fords I have owned, including the '97 Explorer I have had since new, have developed a knock running on regular gas fairly early in their lifespan. My dad's Lincoln, while he was still alive, did the same thing. Switch up one grade of gas from what you are using and the problem will go away. Over the years the octane rating of regular gas has dropped a bit at the pump. Note, engine knock or pinging is the symptom for predetonation, which is when the fuel/air mix explodes before the piston is on a down stroke. Lower octane fuels burn faster, so additives to slow the burn rate are what makes higher octanes. Predetonation IS destructive to the engine and should not be allowed to continue. =Vic= Bear Gap, PA > Hi folks, > [quoted text clipped - 11 lines] > > Allan While buying a higher octane gas may reduce/eliminate symptoms of pinging, wouldn't fixing the problem be less costly in the long run? Here, 89 octane runs about $.22/gallon more than 87 octane. After a while, that price difference would start to add up. I have a 97 Explorer that has ran just fine on 87 octane and now has 130K miles. In higher elevation states like Colorado, they sell 85 octane at the pumps. My owner's manual says to avoid using gas that isn't rated 87 octane, even at higher elevations. To the original poster, have you checked your spark plugs and wires? Spark plug changes are at 100K mile intervals for the explorer engines. > Not sure why, but the last 2 Fords I have owned, including the '97 > Explorer I have had since new, have developed a knock running on regular [quoted text clipped - 26 lines] >> >> Allan SignaturePosted via a free Usenet account from http://www.teranews.com We plan to service the vehicle this coming week, part of that will be to change the plugs and check the wires and change fuel filter amongst other obvious things. We bought the vehicle used at 103,000km a year and a half ago and have put 12,000km on it since. There was no ping when we bought it, this started at about 115,000, hardly noticeable but getting worse as the mileage progresses. Unlikely it had a spark plug change since new. Still have the original tires on it, time to change them however;-) We don't plan to change fuel, book says to run regular. Allan > While buying a higher octane gas may reduce/eliminate symptoms of pinging, > wouldn't fixing the problem be less costly in the long run? Here, 89 octane [quoted text clipped - 38 lines] >>> >>>Allan |
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