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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 88 5.7 350 pickup truck Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Car Troubleshooting markuzzz Anonymous Poster marksoldmyhouse@yahoo.com Jun 9, 2009, 8:54 AM Post #1 of 3 (1301 views) 88 5.7 350 pickup truck Sign In Picked up a used pickup cant get it running right. Mechanic with medium skills here. Throttle body set up the truck is an 88 4X4 stepside. Previous owner did an engine swap. Has new EGR and gasket, new idle control valve, new throttle body base gasket, new tps, new new new all over it. Engine is occilating idle up and down up and down then stalls. Does not always throw a code to initiate check engine light. Good fuel pressure, I give up ! Hammer Time Ultimate Carjunky / Moderator Jun 9, 2009, 9:51 AM Post #2 of 3 (1288 views) Re: 88 5.7 350 pickup truck Sign In Does that mean that it IS setting a code sometimes? What is the code number? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. DanD Veteran / Moderator Jun 9, 2009, 10:02 AM Post #3 of 3 (1284 views) Re: 88 5.7 350 pickup truck Sign In Maybe check the basics, as in ignition timing and minimum base idle; both of these need to be set correctly because the ECM (computer) relies on these static setting to be there. For ignition timing; run engine until up to operating temp and turn engine off; disconnect the EST by-pass. The EST by-pass is a tan/black single wire found close to the distributor or under the right side relay centre cover or possibly behind the bottom of the glove box. Once you find this wire and disconnect it (it’s an in-line connector) restart the engine allow it to stabilize and then set the timing to TDC (0 degrees) Base Idle; again allow the engine to come up to operating temperature and then turn engine off. Jumper terminals A & B of the Assembly Line Data Link (ALDL) connector, the thing you would plug a scanner into. Terminals A & B are the top two terminals to the right side of the connector. Turn the ignition switch to the run position but do not start the engine; the check engine light should begin to flash a code 12, if you’re in the proper terminals. Wait 30 seconds while the Idle Air Control (IAC) motor pintle seats itself. Leave the ignition on and unplug the IAC motor, now turn the ignition off and unplug the ALDL A & B jumper. Start the engine and adjust the idle stop screw of the TBI unit to 5-600 RPM. Turn the engine off; reconnect the IAC motor and then restart the engine. The thing will act a little goofy until the ECM relearns idle motor counts; you may even need to take the truck for a ride above 40 mph before it will relearn. Dan. Canadian "EH"   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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