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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   1989 toyota pickup 3.0 crank no start I have a 1989 toyota pickup 3.0 crank no...   Strut spring orientation and strut mount tension nut 2017 Nissan rogue awd 2.5 L Put in Monro...   Transmission stuck in part, I have tried everything So I'm working on my elderly fathers 201...   2017 dodge journey LED headlights on/off randomly Year of vehicle 2017 Make of vehicle dod...   Kia Soul starter replacement issues! Okay so my car is a 2010 Kia soul 2.0 en...   Please Help - Knock sound & engine fail Hi all, Hoping to get some insight and ...   multiple warning lights 2013 GMC Terrain 130,000 miles 4 cylinde...   03 alero no low speed blower Good day everyone, I have a 2003 Olds a...   04 Chevy 2500hd tail light issues Help!!! I have changed my combo switch...   1999 Grand Caravan Sport not starting. Hi. I'm new here. I hope someone can hel...

emissions failure and back failure Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Car Troubleshooting Vanard Anonymous Poster drew_brown@vanguard.com Jul 5, 2007, 2:17 PM Post #1 of 4 (1437 views) emissions failure and back failure Sign In 1984 dodge 1 ton 360 2wd P/u 4 barrel carb back fires every now and again, especially if I step on the gas peddle quickly to get moving. I failed by .36 on carbon monoxide twice and rejected once for backfiring... I've replaced all the fluids, plugs, wires and thermostat, and done the timing. I starting overheating like crazy so I'm going to replace the water pump. Would the truck heating up to much make the carb backfire and put out more gasses then normal??? Thx for all your help Tom Greenleaf Ultimate Carjunky / Moderator Jul 6, 2007, 5:05 AM Post #2 of 4 (1432 views) Re: emissions failure and back failure Sign In Anything that makes the engine run poorly is going to adversely effect the emissions. Take care of the overheating and the water pump alone if not leaking is probably not the problem. Check and or just flush out the cooling system and make sure fan clutch is good and radiator is good. It's old enough for about anything to be causing problems, T Vanard Anonymous Poster drew_brown@vanguard.com Jul 6, 2007, 9:18 AM Post #3 of 4 (1430 views) Re: emissions failure and back failure Sign In COULD IT BE A BLOWN HEADGASKET??? Tom Greenleaf Ultimate Carjunky / Moderator Jul 7, 2007, 3:38 AM Post #4 of 4 (1427 views) Re: emissions failure and back failure Sign In Doing a memory search for this engine...................... sorry for the wait. I worked on a few of these with strange problems that were in cars MY around 1978 and they had some strange sludge build up under and in intake manifold that was hard to diagnose that caused problems. Head gaskets on these were tough. I think the EGR system may be at fault and timing chains can give up on these with some years and miles. The overheating needs to be addressed and fixed as that will cause problems overall. The backfire could be hot spots in combustion area. Timing chain could be guessed with a couple tricks. Take a dwell reading and it shouldn't vary the timing by more than 5 degrees with advance disabled or just look at rotor in cap while turning crank. It shouldn't exceed 5 degrees either. Dwell will also be affected by worn distributor bearings. The head gasket would probably show up as coolant in oil or loss of coolant out exhaust. Pressure testing cooling system and a compression test could be telling about that. Do you have a good history on this engine and the maintenance over all these years? That could help. Keep in mind that 1984 is a tough year to nail folks for emissions as they weren't well engineered for the levels of just several years newer than that. Car makers were really scrambling to improve standards faster than technology could keep up at the time and that becomes an issue with that year into 1985 or untill they gave in to fuel injection, T   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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