| Author | Message | ||
| Jorma Johansson (Jjfinland)
Junior Member Username: Jjfinland Post Number: 174 Registered: 3-2001 |
Ja jos ei vika poistu , ota suurempi vasara  | ||
| jari roikonen (Jarifinn)
New member Username: Jarifinn Post Number: 1 Registered: 1-2003 |
your bromlem comes from fueldistirbutor,sticky piston in it. Normaly two ways to clear it, at engine running, tap top of the distibutor with small hammer or remove distributor and relese the piston inside using a nosepliers or similar tools. dont lose the O ring , and more important don't touch any adjustments on it without bosch service tools. regards jari | ||
| James Selevan (Jselevan)
Member Username: Jselevan Post Number: 325 Registered: 6-2002 |
Tom - it sounds as though you have traced your problem - although the misguided adjustments of others may be more to blame than the blocked hose. In any event, you must be experiencing a great sigh of relief knowing that it is running correctly. Hope that this is the answer. Sounds as though it is. Congratulations. Jim S. | ||
| Tom Bakowsky (Tbakowsky)
Junior Member Username: Tbakowsky Post Number: 189 Registered: 9-2002 |
James..This seems to have helped the car alot by finding the obstruction in the tank vent system. I used the term "sucking nosie" just to describe the type of sound. It was of course the pressure inside the tank escaping. I was at the shop today and was continueing trying to put the set-up of the engine right. As I said in my last post somebody was trying to eliminate this problem by turning every adjustment screw on the car. I set the car up as best I could with vac gauges. On monday I will use the 4 gas analyzer to set the co adjustment correctly. I took the car out for a drive of a about 20 minutes and the car ran great!! No more fuel dumping. My guess is that with all the incorrect adjustments to the engine it only amplified the problem with the tank vent system. The left side fuel distributor was set way out to lunch. So much so that while the engine was running I could push the sensor plate almost completely open with my hand and have no change in the engine. It would not stall as it should. I will know better on Monday if the problem is completely fixed by how the cold and hot start are after I do the complete set-up of the engine. | ||
| James Selevan (Jselevan)
Member Username: Jselevan Post Number: 324 Registered: 6-2002 |
Tom - I do not like to be the bearer of bad news, but I suspect you have not yet found your problem. First, every time I open my fuel cap to refill, especially in warm weather, there is an enormous pressure and fuel vapor escape. This is normal. You describe a "sucking" sound, suggesting negative pressure. This is bad form, as your fuel tanks will collapse like aluminum soda cans. Second, why would this impact one cylinder bank versus the other? If the negative pressure exceeded the ability for one pump to retrieve fuel, then I could see this, but both pumps should have been struggling to overcome the negative pressure. That you relieved the pressure (relative vacuum) by opening the cap might have temporarily solved the problem, but I am interested to see if it returns. I suspect that a pressure regulator, pump, or injection component has gone south for the winter. The charcoal canister check valve is in line with the rollover valve. You might want to inspect that as well. Do you smell gas? If the canisters are failing, or the breathing system is disrupted, the canisters will become heavy with gas. My canisters were beyond repair as evidence by the charcoal granules that I could get out of them by turning them upside down. However, I am skeptical that this is your problem. Feedback from your experience once you run the engine again will be interesting. Jim S. | ||
| Tom Bakowsky (Tbakowsky)
Junior Member Username: Tbakowsky Post Number: 187 Registered: 9-2002 |
I found the problem!! The fuel tank vent system was plugged!!. I discovered this when I was at the gas station filling up the car. I removed the gas gap and there was more pressure in the tank than usual. Normaly I understand that when a tank is low you will get that "sucking" noise when you remove the gas cap. But this was incredable!! the guy behined me filling up heard it! So on the way back to the shop I left the gas cap loose a little bit to allow it to vent and that seemed to stop the fuel dump. I traced all the vent lines carfully and lightly blowing compressed air in to each one with the gas cap off. Listening and feeling for air escaping from the tank on each vent line told me that those lines were o.k. I then found the line that goes to the purge canister in the right rear of the engine compartment. I undid the line at the oppisit end and and blew through the line. I couln't blow throught it! Following the line back to the canister I found a small check valve. Replaced it and put everything back to normal. This seems to have fixed the problem. Now all I have to do it set the engine back up because some ya hoo turned every friggen adjustment screw on the thing. This should be fun to try and figure out!! Thanks JRV for all your input. It helped out alot. | ||
| JRV (Jrvall)
Member Username: Jrvall Post Number: 750 Registered: 11-2002 |
Tom, It probably would, if you have a know good unit swap them out.. or just ohm out both and compare. On complicated procedures I always refresh my fallible memory with the infallible pages of reference in the WSM for the spedific details. The "late" TR WSM has the specifics of testing the KE-Lamba and "adjusting" after replacement, I'll look it up and post the info tommorow. I think the testing & adjusting info may also in the BOSCH FI Manuels. | ||
| Tom Bakowsky (Tbakowsky)
Junior Member Username: Tbakowsky Post Number: 185 Registered: 9-2002 |
Do you think by replacing the regulator with a knowen good part would make an immediate change? | ||
| JRV (Jrvall)
Member Username: Jrvall Post Number: 749 Registered: 11-2002 |
Internal damage...Hmmmm...possible...the diaphragm can blow out...but normally I'd say not. The AFM Plate resistance is controled by the pressure differential in the upper & lower chambers of the FD, which is regulated by the electro valve on the side of the FD....no resistance/pressure differential...it floods. Testing & setting them up requires following the WSM instructions. | ||
| bruce wellington (Bws88tr)
Intermediate Member Username: Bws88tr Post Number: 1706 Registered: 4-2002 |
ACTUALLY JRV I HAVE TO CONFESS...WITH ALL THE BASHING GOING AROUND WITH YOU, ME AND SOME OTHER MEMBERS, YOU SEEM TO KNOW WHAT YOU ARE TALKING ABOUT AND SHOW A WILLINGNESS TO HELP PEOPLE ABOUT QUESTIONS IN YOUR FIELD..I COMMEND YOU,MAYBE A CHANGE OF HEART FOR YOU.. O, BTW, I STILL THINK EUGENIO EXISTS... | ||
| Tom Bakowsky (Tbakowsky)
Junior Member Username: Tbakowsky Post Number: 183 Registered: 9-2002 |
I thought of that as well. I know that it has to deal with the fuel pressure some how. If it is that problem can it cause internal damage to the fuel distributor? | ||
| JRV (Jrvall)
Member Username: Jrvall Post Number: 748 Registered: 11-2002 |
I figured it would have KE...darn the luck... It's very possible the electric fuel chamber pressure regulator is bad on one side. On the sides of the FD's is a small electric unit, it equalizes upper & lower chamber pressure. When the go bad they run rich/flood. | ||
| Tom Bakowsky (Tbakowsky)
Junior Member Username: Tbakowsky Post Number: 182 Registered: 9-2002 |
Sorry it's an 88., KE jtronic with lambda | ||
| JRV (Jrvall)
Member Username: Jrvall Post Number: 747 Registered: 11-2002 |
What year is your car, TR's have more than one type of FD setup. | ||
| Tom Bakowsky (Tbakowsky)
Junior Member Username: Tbakowsky Post Number: 181 Registered: 9-2002 |
has anybody run into this problem before? The left bank fuel distributor seems to be dumping to much fuel causing an extremly rich condition on the left side bank. Sombody has played with the set up on the engine to try and compensate for this problem. I've done the steps to ensure both sides are running at the same vaccuum. And that the engine is close to beeing balanced vaccum wise. I notice when I slighly push down on the right side airflow meter flap, the the engine starts to surge as expected. But I can push the left side airflow meter flap almost all the way open and there is no change on the engine. It seems to me that the left side fuel distributor is consantly dumping fuel. I tried to swap computers from side to side with no change. Could this be the airfolw meter position sensor on the side of the meter? Or could it be the regulator on the side of the fuel distributor? What about a bad pressure regulator? I want a general direction to go before I start pulling this apart and wast mine and my customers time. Please help. This car has been to three other shops to try and locate this problem. I want to be the one to fix it!! |