MadeInJapan Posted July 8, 2012 Report Share Posted July 8, 2012 '98 S70 T5 w/ IPD ECU, well maintained. 207K miles. Had an issue about a month ago driving up a mountain on a trip- set the engine light blinking after misfire...was a code for misfire on cylinder 5...reset the code and kept going. After I reached my destination, bought new Volvo turbo plugs and changed them out. I noticed that there was some hesitation coming to a full stop and also off the line at a light but only occasionally. I realized that it has been awhile since a tune-up so I did that this past week- new bougicord ignition wires, bosh cap and rotor. Still the problem persisted. I thought well maybe it's my transmission not engaging in the low gears well (sure felt more like a slight misfire until I hit the gas)...so I did a transmission flush...wow, expensive to replace Mobil-1 synthetic ATF... That was done today. Took it for a ride down the interstate and back home...stopped back at the AutoZone to buy one more quart of ATF in case I needed to top off- apparently it didn't need it- up to the "hot" line after 20-30 minutes of spirited driving- but the slight hesitation was still felt off the line once at the red light right before the AutoZone. While checking my ATF level, notice erratic idling and then great bellows of white smoke from my exhaust...the AutoZone guys was like, "what's wrong with your car?" I donnu...need to check it. I got in the car and it died instantly. I used my code reader and got a P0261 code (Cylinder 1 Injector Circuit Low)...I cleared it and tried to start the car again- very poor start, so I pulled the MAF sensor and it did start- still clouds of smoke but not as bad and very rough idle. Check engine light comes on again. This time the code is P0201 ((Injector Circuit Malfunction- Cylinder 1) and the first code was not present. I turn car off let it sit a minute, cleared code again and started it- still P0201...and rough idle- some smoke. Turn car off, clear code again, let it sit an hour and try to start it. Starts without a problem and no code. Drove it around some- seems okay. Pulled into the garage and very slow in low gear I feel poor idle again. Tried to get it to set the code again but it won't. So what gives? I was trying to get the car in shape so I could drive it to Alabama tomorrow to visit my dad who just lost his wife. Need to go spend time with him but not about to drive this car far without knowing what is up and what to do. Has anyone dealt with this? I feel that the tranny flush has absolutely no relation to whatever is going on here. Thanks in advance. MIJ Link to comment Share on other sites More sharing options...
DVolvoguy850T5 Posted July 8, 2012 Report Share Posted July 8, 2012 Hey MIJ, pull the plugs and check the compression in all the cylinders. Smoke could be valve stem seals. If you have low compression could be rings or valves. You could also check for grounding issues. Link to comment Share on other sites More sharing options...
MadeInJapan Posted July 9, 2012 Author Report Share Posted July 9, 2012 Thanks but to get codes like those, I'm thinking it's actually an internally shorting injector...or worse yet, wiring to the injector that's not doing it's job. I tried injector cleaner in my gas- that didn't work. I also cleaned the connectors to the injectors and put Naolox on the connecting parts themselves so that they would have a good strong bond. When I went to get some gas I was hoping things had settled down but I'm getting the same codes as before with horrible gas smelling white exhaust, with the 261 code being more prominent. Oh, and I just changed valve stem seals not 6 months ago, so know they're good. Link to comment Share on other sites More sharing options...
phunktified Posted July 9, 2012 Report Share Posted July 9, 2012 you can try swapping the injector to another cylinder to see if the problem follows it.. but also compression test is a good idea esp. at that mileage and with all that smoke you mentioned.. :) Link to comment Share on other sites More sharing options...
MadeInJapan Posted July 9, 2012 Author Report Share Posted July 9, 2012 Why this suddenly started with a tranny flush is what confuses me. This issue is intermittent. It only happens when apparently the short is showing up...now it's not as intermittent as it was earlier today. When the car is running right- even today, compression was very good- it pulled hard coming up our hill. Also, if plugs or wires were bad, I would be getting a misfire code wouldn't I? I'm not so my thinking is that these things are fine. I have to tend to a few things for a couple of hours- I'll check back in a bit. Do you think driving the car 50 miles to my mechanic would be harmful to it? Link to comment Share on other sites More sharing options...
MadeInJapan Posted July 9, 2012 Author Report Share Posted July 9, 2012 Actually, I didn't have to do what I thought I would be doing- Open for responses... I guess my next logical step is to take the fuel rail off and try to switch injectors and see if the problem follows an injector. Link to comment Share on other sites More sharing options...
DVolvoguy850T5 Posted July 9, 2012 Report Share Posted July 9, 2012 Try the injectors. You can also open your coolant reservoir to see if it peculates. Only thing, you said it pulled good... So, this one stumps me for now. Time to get kiddo to bed! Link to comment Share on other sites More sharing options...
MadeInJapan Posted July 9, 2012 Author Report Share Posted July 9, 2012 Well checked the injectors- they all ohm out at 17.6ohms- very consistent across the board- even the one that was suspect. Even so, I swapped it (#1) with #5 tonight...in the process injector #1 that I was trying to push in the fuel rail ended up with a torn o-ring...these o-rings are old...never been out of the fuel rail I suspect. Anyway, a very quick to trip to AutoZone (got there as they were closing, it being a Sunday) and they happened to have some generic injector o-rings that appear to fit the bill. When I reinserted that one that had the o-ring replaced, it noticed it was looser than the others- Oh well, that's the best I can do for now. Started the car...barely started, but then again the fuel rail had been starved of gas. Once started, no codes at all...I backed the car out of the garage and put it in drive to go back in...I can feel a hesitation...like it might be slightly missing. I plan to drive the car to Sweetwater in the morning...at least if an injector is bad, it's on #5 now...will drive slow and steady. I am however feeling that before my trip is over I'll get a CEL and #1 injector circuit malfunction again. If this happens, I'll know it's not the injector but wiring to it or some process that pushes it. The other option is to replace the ECU...the one in it was software upgraded by IPD...it could somehow be related- it could be a computer problem. I have the original ECU still so if it throws another code, I'll try swapping out ECU's and see if that makes any difference at all. Any other suggestions?? Oh, and I'm trying to think of why I would want see if my coolant reservoir peculates. I suppose a thought is I have a bad head gasket but that's not it...it ran fine this evening for about 5 mins...no white smoke and it only happens when cylinder 1 isn't getting proper fuel injection (if what the code says is true)...I suspect the trouble will come back- idle still felt funky. Link to comment Share on other sites More sharing options...
DVolvoguy850T5 Posted July 9, 2012 Report Share Posted July 9, 2012 You knew what I meant when I mentioned peculating! All good. You mentioned trans flush, check the vac lines in that area and see if one of those got dislodged when the tranny line was pulled. Could be smog related unless you did the sas delete. That'll code you out as well. Replace all the injector o rings with the correct ones when you can and sees of that works. Link to comment Share on other sites More sharing options...
MadeInJapan Posted July 9, 2012 Author Report Share Posted July 9, 2012 Good idea on the vac lines- I think they are good but will check them. Strange though that I continue to get only the cylinder 1 injector codes...seems very specific.. I was really careful and didn't really spill anything but I should check to see if I pulled a wire loose somewhere. It could be- never know. Things have not felt good especially coming off high speed to a stop..idle waiting for a light change- that's what prompted all of my recent maintenance- plug change, cap and rotor change and then full ATF flush today. Btw, I used the Mobil-1 synthetic...looks the same (description) of what was in there when I did this a few years back... Link to comment Share on other sites More sharing options...
MadeInJapan Posted July 10, 2012 Author Report Share Posted July 10, 2012 I limped the S70 to a friend/mechanic's today about 50 miles away. It took us all morning to trouble shoot this.. End result was that the ground wire to #1 ignition connector was internittently shorting to a live 12volt wire. When he rocked the car from side to side, his test light plugged into the ground showed bright with high voltage. He then got a diagram that showed that the ground wire went directly to the ECU...and so he snipped the wire at the ECU box and ran a new one to the #1 injector. The clipped ends were then terminated with heat shrink tubing so they would not create any other shorts elsewhere. End of story. The car ran marvelously on a 250+ mile trip to see my dad...my gas mileage was awesome!! I'm thinking this problem had been going on for awhile and just now got bad enough to set a CEL and create havoc with the condition being less intermittant and more constant. Btw, on my way to my friend's, the trouble code that kept being set was the P0261...I would erase it as I was moving but it kept coming back. Essentially the problem I had created an "open" injector (no flickering) which meant that gas was being dumped into cyliner #1 without stop as soon as the key was turned to the on position- even if the car was not started. No wonder over the last few months I had noticed white smoke out the back on start-up.... I had even replaced valve stem seals thinking that was the problem. Link to comment Share on other sites More sharing options...
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