| Author | Message | ||
     Mike Stump (Anticommittee) New Member Username: Anticommittee Post Number: 1 Registered: 02-2003 |
Engine missing badly. I just replaced the spark plugs, plug wires and fuel filter. Still missing badly. Any ideas? OH yeah it's a 97 Discovery | ||
| Prescottj (Prescottj) Member Username: Prescottj Post Number: 224 Registered: 12-2002 |
What codes did you get? | ||
| Mike Stump (Anticommittee) New Member Username: Anticommittee Post Number: 2 Registered: 02-2003 |
I had a guy check the engine and he said that the number 3 and 6 cylinder weren't firing. That was before I put the new plug wires on though. New plug wires had no effect. Do I need to clear the codes now? Do I check the codes under the front seat like it says to do in the tech section? | ||
| lance (Twyst10) New Member Username: Twyst10 Post Number: 2 Registered: 02-2003 |
intake manifold gasket! same exact thing happen to me. first place i would check | ||
| Ed Petrush (Exp3) Member Username: Exp3 Post Number: 73 Registered: 06-2002 |
i would double check that the spark plug wires were put on correctly.. would double & triple check your work. Was it misfiring before you changed the wires? did you inspect the cap & rotor? (might be cracked) | ||
| lance (Twyst10) New Member Username: Twyst10 Post Number: 9 Registered: 02-2003 |
does a 97 d1 have a cap and rotor or is it individual(best discribed as coils) coils like mine (96 disco)? you might want to ck each coil if its like my disco, but why would you lose 2 at once? that is what you need to think about! if you have a cap and rotor then this is possible but if you have the style like mine then it is highly unlikly. does this help? | ||
| Brad Noviski (Bradnoviski) New Member Username: Bradnoviski Post Number: 10 Registered: 02-2003 |
Mike I beleave all discos after 96 do not have a cap and rotor. They have coils. One per plug. If the check engine light is on, you will need a OBD2 code reader to read the fault codes. There is nothing under the seat to read. Make sure all the wires are firmly seated and connected to the correct spark plug. According to my shop manual, if you have a bad coil, there will be a fault code. | ||
| Joe M. (Little_joe) Member Username: Little_joe Post Number: 64 Registered: 11-2002 |
Ditto on double-checking the wires and plugs, and also make sure you have them in the proper coil pack at the back of then engine. This is almost too coincidental......... If you need the plug wire diagram or order, just say the word. joe | ||
| Peter Matusov (Pmatusov) Senior Member Username: Pmatusov Post Number: 484 Registered: 09-2002 |
Actually, there are four coils for eight plugs, with two terminals of each coil connected to two plugs, so at any given spark time two plugs fire simultaneously. One of them near TDC at compression stroke, another - near TDC at exhaust stroke (am I right here?). If one coil goes bad, two cylinders will misfire. What's the firing sequence? peter | ||
| Brad Noviski (Bradnoviski) New Member Username: Bradnoviski Post Number: 11 Registered: 02-2003 |
Peter My bad. you are right about the number coils. I was counting hte terminals brad | ||
| Mike Stump (Anticommittee) New Member Username: Anticommittee Post Number: 3 Registered: 02-2003 |
I'm starting to think it might be a coil. Check engine light not on, but can I visually inspect a coil or do I need to have someone look at it? | ||
| John Houseman (John_houseman) New Member Username: John_houseman Post Number: 6 Registered: 02-2003 |
missfires could also be caused by a bad vss vehicle speed sensor how exactly does it run | ||
| J E Robison Service Co (Robisonservice) Senior Member Username: Robisonservice Post Number: 36 Registered: 10-2002 |
I can rule some things out if your report on faults is right: You do not have a bad coil pack. There are 4 coils each of which fires 2 cylinders. So if one dies they both die. 3 and 6 are on 2 different coils. You do not have a bad speed sensor. The speed sensor cuts odd cylinders, not both odd and even. Also the speedo flutters when that happens. With a steady miss you might have an injector probelm. You might have a compression problem - did you check that? You might have a bad intake as suggested above but I doubt that. My first guesses are compression and injection. John www.robisonservice.com | ||
| Ron Brown (Ron) Member Username: Ron Post Number: 79 Registered: 04-2001 |
Valves | ||
| joe costanza (Wolfe) New Member Username: Wolfe Post Number: 1 Registered: 02-2003 |
I am looking for help. Can't seem to find what the codes mean (trouble codes) I have an auto xray scanner, and get the trouble code p1316 manufacturer specific drivetrain for a 96 discov. any help would be appreciated. | ||
| J E Robison Service Co (Robisonservice) Senior Member Username: Robisonservice Post Number: 41 Registered: 10-2002 |
1316 is misfire causing excessive emissions. Sticking valves or ignition failure. John www.robisonservice.com When I said compression probelm above I was referring to sticking valves, by the way. | ||
| Jeffrey Pinson (Jeffro0502) New Member Username: Jeffro0502 Post Number: 2 Registered: 02-2003 |
Found this earlier....very helpful to find out what your code means! http://www.spanishtrailrovers.com/Tech/Info/OBDII_Scan_Codes/obdii_scan_codes.ht ml |
