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Ford V10 Problems

Excessive spark knock when under a load

Posted by Anonymous on

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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 321 Answers

SOURCE: spark knock under a load

Definitely a timing issue,distributor,ignition module,possibly timing chain jumped a tooth.I would attach a scan tool and look at the timing the PCM is seeing when all this is going on.For the meanwhile,run 93 octane as it will help to ward off the spark knock.Spark knock is actually preignition,otherwise known as detonation,and it is very tough on the rod bearings and pistons

Posted on Jul 26, 2008

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MrBirdMan64
  • 183 Answers

SOURCE: spark knock i think under loads or up hills

Your timing could be too far advanced, EGR valve could be stuck closed, engine could be getting too hot (antifreeze leak or stuck thermostat), or there could be excessive carbon buildup on top of your piston, causing a hot spot.

The most common cause ive found is a dirty or defective mass air flow sensor. You can try removing the sensor and cleaning it first.

Posted on Mar 30, 2010

Awaji
  • 77 Answers

SOURCE: my ford v10 engines hesitates under load. It

1 Ignition system not operating properly
2 Dirtyor clogged fuel injector(s).
3 Low fuel pressure. Check for proper operation of the fuel pump and for restrictions in the fuel filter and lines.
4 Fuel injectionor engine control systems malfunction.
5 Vacuum leak at the intake manifold or vacuum hoses.
6 Restricted air filter.
7 Fuel pump or pressure regulator defective.

Posted on Dec 05, 2010

elix0411
  • 3530 Answers

SOURCE: 98 toyota rav4 2 door

Welcome to Fixya
There are things to look at are the rear diff mount - which goes soft and allows the diff to rock/tilt back and forward. This can be stiffened by filling the bush with silicon gunge. next is to have a good check of the rear trailing arm bushes and suspension mounting bushes. Lastly, or maybe should be first as its the easiest to check.. make sure the rear hub centre nut is torqued to the right setting. If this has loosened off, perhaps through a little wear, than it can cause a clunk when the car is on a ramp.
Thank you for using Fixya!

Posted on Jun 17, 2011

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Your timing could be too far advanced, EGR valve could be stuck closed, engine could be getting too hot (antifreeze leak or stuck thermostat), or there could be excessive carbon buildup on top of your piston, causing a hot spot.

The most common cause ive found is a dirty or defective mass air flow sensor. You can try removing the sensor and cleaning it first.

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My ford v10 engines hesitates under load. It


1 Ignition system not operating properly
2 Dirtyor clogged fuel injector(s).
3 Low fuel pressure. Check for proper operation of the fuel pump and for restrictions in the fuel filter and lines.
4 Fuel injectionor engine control systems malfunction.
5 Vacuum leak at the intake manifold or vacuum hoses.
6 Restricted air filter.
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1 Answer

Positive it is not the engine its is a new rebuild. sounds similar to a very loud spark knock or rod knock and gets a little better as it warms up. however, under load it gets worse again the flulid levels...


A new rebuild would be the first suspect. Rebuilds have problems all the time. Take it to the shop that installed it. They can work with the rebuilder to resovle the problem, but first the problem has to be found. If its NOT the engine, you will have to pay. I dont know what a tail shaft has to do with a knock, its either in the engine or its not.

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How many miles can i get with my v10


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Definitely a timing issue,distributor,ignition module,possibly timing chain jumped a tooth.I would attach a scan tool and look at the timing the PCM is seeing when all this is going on.For the meanwhile,run 93 octane as it will help to ward off the spark knock.Spark knock is actually preignition,otherwise known as detonation,and it is very tough on the rod bearings and pistons

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Hi

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Diesels, however have the added bonus of being able to create a nice knock due bad fuel atomisation, overfuelling, or excess oil burning.

Bad fuel atomisation is usually caused by dirty injectors.

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Very best regards

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