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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   Drive Shaft Repair I have a 2015 Chevy Traverse AWD. The fr...   2006 Toyoto Camry XLE Driver Side Electric Window Trouble Hello, Looking for a little brain help ...   Tierod end change caused some kind of leak Hello so I just took my car to the nearb...   2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes When I bought this car in summer 2023, a... Grounding Cable, 2017 Jeep Renegade Trailhawk The Cable that connects my negative batt... Rough Idle (Found new thing) Hi everyone. First of all sorry for bad ...     equipment hey yall. im a first year engineering st...   HELP I have a 1956 1/2 ton panel truck, 69 35...   Howdy     Just wanted to s...   ABS/Tractiob/Brake Lights on But No DTCs Hello all, Recently while driving m...

Search Auto Parts Search Only running on 3 cylinders Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Engine Troubleshooting Lizzie New User Jan 14, 2007, 5:14 AM Post #1 of 3 (1700 views) Only running on 3 cylinders Sign In A few months ago I bought my first car, an '89 Ford Laser (with a carbie). A while ago I noticed it kind of jerked when I took my foot of the accelerator, but it only happened on and off, and not too badly, so at first I didn't worry too badly. But then it started doing it much worse, and I had a lot of trouble getting her started. When the engine is cold she'll stall if I'm not revving her and in the lower gears, she jerks quite violently. I got my dad to look at her as soon as it became bad, and he reckons she's only running on 3 cylinders. We're going to replace the spark plugs and distributor cap, but my dad doesn't think that's the real cause and only part of the problem, but he doesn't know what else it could be. Any ideas? steve01832 Veteran Jan 14, 2007, 6:07 AM Post #2 of 3 (1692 views) Re: Only running on 3 cylinders Sign In You should start with a compression check on all cylinders. The compression guage should jump up to 50-75 lbs. on the first puff. The third puff should be around 120 lbs. If compression is low on all 4 cylinders, check timing belt/chain. If compression is ok on all 4 cylinders, proceed with ignition and fuel testing. Steve Lizzie New User Jan 22, 2007, 3:03 AM Post #3 of 3 (1674 views) Re: Only running on 3 cylinders Sign In Thanks for that, so far no luck with anything we've tried, we have yet to try the compression test. It's looking like it might be a valve though, so I'll probably get a professional to have a look since it's beyond our capabilities.   Email This Post   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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