Compression Test

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Author Message   Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 501 Registered: 11-2002 Posted on Wednesday, July 16, 2003 - 06:43 pm:    What fuse do I pull for a compression test? 97...no distributor. Tried the big one under the hood. That one didn't work.   Joey (Joey4420) Member Username: Joey4420 Post Number: 105 Registered: 04-2003 Posted on Thursday, July 17, 2003 - 07:53 am:    Compression pressure gauge Test 1. Start and run engine until normal engine operating temperature is achieved (thermostat open). 2. Remove all spark plugs. 3. Disconnect both coil negative (WB) leads 4. Insert compression gauge, crank engine until reading stabilises. 5. Expected readings, throttle fully open, battery fully charged: 8.31:1 = 10.2-10.9 bar, 150-160lbf/in 2 9.35:1 = 11.5-12.2 bar, 170-180lbf/in 2 Hope this helps. Joey   Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 502 Registered: 11-2002 Posted on Thursday, July 17, 2003 - 02:34 pm:    Nope. Don't have a coil. Thanks, though.   Joey (Joey4420) Member Username: Joey4420 Post Number: 106 Registered: 04-2003 Posted on Thursday, July 17, 2003 - 09:42 pm:    Sorry forgot that my Rave info does not go past '95 models on some stuff. Sorry. The '97 does have the multi plug non-disributor (tech terms here) that should be able to be unplugged.   Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 506 Registered: 11-2002 Posted on Friday, July 18, 2003 - 07:12 am:    Yeah. Couldn't find a plug, so I pulled all the plug wires and the fuel pump fuse. It seemed to work. All pressure is between 170-190 so it looks like it isn't valves. Don't know what else it could be.   Joey (Joey4420) Member Username: Joey4420 Post Number: 108 Registered: 04-2003 Posted on Friday, July 18, 2003 - 08:48 am:    Whats the problem that you are having? Must have missed your other post about an issue.   Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 509 Registered: 11-2002 Posted on Saturday, July 19, 2003 - 06:12 am:    Here are the codes it went in there with: 1316 1317...both environmental 300- General Misfire 305- #5 307- #7 Also, he said the fuel trim is in the negatives. It is a 97 D1   Joey (Joey4420) Member Username: Joey4420 Post Number: 109 Registered: 04-2003 Posted on Saturday, July 19, 2003 - 09:08 am:    P0300 Misfire On Multiple Cylinder P0305 Misfire Cylinder 5 P0307 Misfire Cylinder 7 P1316 Misfire Excessive Emissions Fault P1317 ABS Rough Road Line Low Fault Found via http://www.troublecodes.net/landrvr/ I would start with plugs and wires, and then check you fuel injectors.   Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 510 Registered: 11-2002 Posted on Saturday, July 19, 2003 - 10:00 am:    Yeah. I already knew what the codes were for. New plugs. New wires. Twice. Compression checks good. Suspected INjectors were changed last year. Any other ideas?