| Author | Message | ||
     Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 547 Registered: 11-2002 |
Been trying to track down the source of a few problems now for about 4 years. The one that really bugs me is the misfires. I keep getting codes for misfires on different cylinders. Changed plugs, wires, did compression check...nothing helps. Took it to my local garage, and they couldn't figure it out either. It is a 97 with no distributor. Don't know much about how this system works. My workshop manual is from 95 with a distributor. Also, I have a starting problem. Takes forever to start. It cranks and cranks, then finally starts, but idles rough with white smoke coming from the exhaust. If I give it gas when starting, it sometimes backfires. Changed the injectors for the cylinders that were throwing the misfire codes. Still nothing. I really don't want to take it to the dealer, as they will charge me a ton of money to investigate what the problem is and probably be wrong. Once it is started, it runs great. I took it from Myrtle Beach to Orlando and back, Virginia and back, and Canada and back this summer with no problems. Any help will be greatly appreciated. | ||
| Al Oliveira (Offroaddisco) Senior Member Username: Offroaddisco Post Number: 1505 Registered: 04-2002 |
Carbon build up on valves? | ||
| Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 550 Registered: 11-2002 |
Ran sea foam through several times. Wouldn't a compression check show if carbon was on the valves? Compression was all within 10% of each other. | ||
| Will Cupp (W_cupp) New Member Username: W_cupp Post Number: 33 Registered: 07-2003 |
I wonder if air is getting in your fuel line somehow? Would that cause the gas to run back into the tank when the truck sits for a while? Then, when you try to start the truck it has to pump back up to the fuel rail. | ||
| Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 551 Registered: 11-2002 |
I thought of that, so I tried letting it sit with the key on for a while until the pump stopped before starting it. Didn't help. | ||
| Chris Browne (Chris_browne) Senior Member Username: Chris_browne Post Number: 286 Registered: 02-2003 |
The starting problem and the other problems are caused by different reasons. Isn't there a water temp sensor that triggers a rich start when it senses the coolant is cold? If so I would replace that sensor and see if it improves starting. That its running well once its going is encouraging. White smoke = oil. either leak down from valves Or blow by the rings, which is the trigger for all the coking up of the valves. What viscousity are you using? | ||
| Mark & Bev Preston (Markp) Member Username: Markp Post Number: 224 Registered: 02-2002 |
White smoke = water / coolant / head gasket Blue smoke = oil / valve guides / rings Black smoke = excessive rich Have you checked the coolant level over time? | ||
| Bill Howell (Billh13) Member Username: Billh13 Post Number: 149 Registered: 03-2003 |
Chris, I thought white smoke = water = anti-freeze. If you could tell me how to get oil to burn white I would love to know. I have this car that is really burning alot of oil and it is black. Greg, You most likely have and EFI problem of some sort or a leaking head gasket. Bite the bullet and take it to the dealer. They rook you on the bill, but they have seen this before and can fix it. | ||
| Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 552 Registered: 11-2002 |
Is there a way to check to be sure it is the head gasket? I'd like to know before I take it anywhere | ||
| M. K. Watson (Lrover94) Senior Member Username: Lrover94 Post Number: 1004 Registered: 02-2002 |
Greg, get a wrench to run a pressure check on the coolant system. its sorta like a leak down test on a cylinder but on the coolant system. you can also pull the plugs and look for the bad cylinder, if it is sucking coolant then it will show on the plug. and one last thing....white smoke does not always equate water, petrol in a aerosole state, which can occurr if you have too much fuel, very little air and with the right temp. and air pressure will produce this white cloud. this is for obivous reason bad on the cats. it will kill them and the O2 sensors quick. if you do a leak down test and there is no leak and after looking at the plugs and there is no evidence of coolant residue then IMHO non rover mechanic, steam propulsion engineer opinion you have a leaky injector. best of luck! mike w | ||
| Greg French (Gregfrench) Senior Member Username: Gregfrench Post Number: 554 Registered: 11-2002 |
Thanks. I have never had a problem with coolant. It has never been low in the 5 years I have owned the truck. I guess a leaky injector would explain the starting problem and the misfires all in one easy-t-explain package. I guess I will change the rest of the injectors and see if that fixes it. Of course, any other suggestions would be appreciated. |
