| Author | Message | ||
     Raf usher (Zonamaya) Member Username: Zonamaya Post Number: 104 Registered: 05-2003 |
ok.. i have my o2 sensor on order from carparts.com for $38. they will be here in 7 days. i was trying to test my VAC on the distrubutor, and i do think it is working. i sucked on it, and i blew into it.. and i think that may be the low idle problem ok guys, 1. what does the VAC do, and will that effect my idle? 2. where can i find a VAC? and how much? | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1656 Registered: 02-2002 |
1: The device you are describing is referred to as a vacuum advance canister. It's function is to adjust the ignition timing as the position of the throttle (and engine speed) changes. As vacuum is applied, the base plate in the distributor advances the timing. 2: any of the Rover parts distribuotrs will have one-Don't know cost. Have you put a timing light on the truck to determine ignition timing? | ||
| Raf usher (Zonamaya) Member Username: Zonamaya Post Number: 105 Registered: 05-2003 |
how do i check the timming on this thing? where should the marks be? | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1658 Registered: 02-2002 |
Raf: The timing should be set to approximately 6' BTDC. There is a scale etched on the front pulley and a corresponding pointer on the front cover. The marks are sorta visible from the front, looking down toward the front pulley, slightly to the left side of the rig. If you don't smear some tire crayon or soapstone on the marks first, you ain't likely to see them. I worked on a Rangie last month that wouldn't idle for love nor money. Turned out to be a few things, but the timing being way off was a major contributing factor. | ||
| Shaun Power (Shaunp) New Member Username: Shaunp Post Number: 27 Registered: 05-2003 |
The vac advance diaphram is a common failure and causes idle problems,overheating and high fuel consumption. They cost $250 Australian for LR part. There is a bloke here in Brisbane called Advanced diaphram solutions, he rebuilds them on exchange basis and posts them to you complete with return mail bag cost is $60 + $ 30 deposit, you can pay on credit card. I have used a few and they work well. Australian cars used this type of ignition long after the US cars. I find they are normally stuffed at 80k KM. I'll find his details and post them. | ||
| Shaun Power (Shaunp) New Member Username: Shaunp Post Number: 28 Registered: 05-2003 |
Here is the link http://www.advancediaphragmoptions.com/ | ||
| Raf usher (Zonamaya) Member Username: Zonamaya Post Number: 109 Registered: 05-2003 |
hey paul.. what was the other issues? (i will check my timming this week) oh. about my vac... i ran the engine, and disconected it, an dnothing happened. the engine still ran the same. i also pumped/blew and sucked(gently) air into the vac while it was running and nothing happened except that i could blow and suck air threw it w/o resistance and w/ no change. what do you guys think? | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1670 Registered: 02-2002 |
Raf: If there is little to no resistance to blowing air through the vacuum advance, it is shot. As for other issues, I replaced nearly every sensor on the engine other than the oxygen sensors. As this truck would heat up, you could tell when each sensor reacted incorrectly. When they were replaced sequentially, the problems went away and finally, to smooth it out, the timing was set. Also, although this doesn't apply to your truck, the ignition amplifier was relocated and several badly corroded wires were discovered, along with a bad ignition amplifier. Your truck already has the amp where it belongs. It was very comforting to me to see that replacement of the fuel and coolant temp sensors had an immediate and noticeable impact on the idle. I like it when the smoking gun is obvious. | ||
| Raf usher (Zonamaya) Member Username: Zonamaya Post Number: 113 Registered: 05-2003 |
paul.. did you get the computer shoot any codes for those fuel and coolant sensors? | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1673 Registered: 02-2002 |
You know, I got the check engine light to come on once, briefly. Never to return. I don't have a lot of faith in the diagnostic readouts, but sometimes, they are helpful. A lot of times, I will swap in a known good coolant temp sensor to try. sometimes, it works, sometimes, no. | ||
| Shaun Power (Shaunp) New Member Username: Shaunp Post Number: 33 Registered: 05-2003 |
I agree with Paul error codes don't tell you what is wrong just maybe where to look. Half the time they aren't there by the time you look at the car. | ||
| Raf usher (Zonamaya) Member Username: Zonamaya Post Number: 116 Registered: 05-2003 |
would the tps(throttle sensor) throw a code? | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1684 Registered: 02-2002 |
Yes, most definitely, but not until it was completely unresponsive. There is a fairly simple test method requiring only an ohmmeter. I don't have it handy, check your workshop manual. To give you a presumptive indication, try gently tapping on the TPS while the engine is running. If the idle changes, it MIGHT be the TPS. Some have told me of this test method working and in some cases, it was painfully obvious that the TPS was the culprit. Peace, Paul | ||
| Raf usher (Zonamaya) Member Username: Zonamaya Post Number: 117 Registered: 05-2003 |
is there another vac adv unit that can be interchanged with the lr brand? | ||
| Paul T. Schram (Paulschram) Senior Member Username: Paulschram Post Number: 1687 Registered: 02-2002 |
You might take it into your local parts store and see if they can visually match it to something. Surprisingly, I do this quite often and it works often. Peace, Paul | ||
| Shaun Power (Shaunp) New Member Username: Shaunp Post Number: 36 Registered: 05-2003 |
Raf Contact the bloke here in Australia his work fine,I know he will mail them any where $60 + $30 deposit. Australian dollar is worh 65c US so this may be your cheapest option. I work that out to be $39 + $19 plus postage and you get the $19 back when you post back your old unit. | ||
| Raf usher (Zonamaya) Member Username: Zonamaya Post Number: 122 Registered: 05-2003 |
i'm chuffed! but he doesnt write back. call the blomming bannana and tell him to write me back. |
