| Author | Message | ||
     Aaron Richardet (Draaronr) Senior Member Username: Draaronr Post Number: 407 Registered: 09-2002 |
1990 RR classic. Cuts out under acceleration and while driving down the road. At idle vehicle idle varies in low 700s and upper 600s. Took to dealer they said checked it on testbook and said to try to replace the air intake gasket. Did that seemed okay for 10 miles then started to do the cutting out again. If I hit the gas it has a slight hesitation and you can hear it pop under the hood like it is sucking air. Checked readout under seat and it says 17 which it tps. Checked ohms fine, checked volts appears within normals at closed and wide open. Could problem be in the middle somewhere? Would this cause it to idle weird also. Idles like it has a vacuum leak. Changed all lines that I can find for vacuum system, all new plugs, wires, cap rotor. IAC is new. Driving me nuts and I cannot even drive the vehicle it gets so bad. I feel it is electrical since it gets worse as time goes on, then reset the computer (ie unplug battery) and it runs fine, then codes show up. Testbook at dealer showed codes.45, 40, 12 23 59 36 17 18. Please help I am losing my mind over this problem | ||
| Randall Smith (Mr_smith) Member Username: Mr_smith Post Number: 222 Registered: 04-2003 |
Aaron How many miles on your truck? I suspect you have two or three problems that ad up to wierdness. First thing i would do is replace the TPS. The TPS only last for ~100k. "Cuts out under acceleration and while driving down the road." is classic sign that TPS is going bad. You may also have a bad ground. Almost every device in your EFI system grounds to a screw under the coolant resivoir. Rebuild that ground. Or better yet, just connect those grounds directly to the neg battery terminal. There is also a ground strap which goes from the block to the ig coil. And another strap connecting the DS cylinder head to the hood. If those straps aren't correctly attached, kaos will result. Any relays clicking when you problems occur? Randall | ||
| Don Johnson (Dl_johnson) New Member Username: Dl_johnson Post Number: 1 Registered: 02-2004 |
The hesitation and pop/whoosh sound are exactly the same symptons I had with a bad vacuum advance on my 95 D90. Hook up a vacuum pump and see if the advance holds vacuum. Also don't miss the small 4"-6" vaccuum line that runs from the hot idle on the fuel rail to the IAC. The TPS should be checked throughout the range, wide open to closed, and should read smooth. As you can see this is my first post. Been in DIY mode on my Rover for about 3 years. | ||
| Aaron Richardet (Draaronr) Senior Member Username: Draaronr Post Number: 411 Registered: 09-2002 |
Ordered the tps today, so we will see on thursday. If you have any more ideas fire them away. I will check the grounds tonight. The vacuum advance is good, thanks for the tip | ||
| Randall Smith (Mr_smith) Member Username: Mr_smith Post Number: 224 Registered: 04-2003 |
The fuel pump also has it's on ground, which is accessable in the left rear wheel well. You may still have a vacuum leak which is making the idle strange and throwing codes as engine idles. I only recomend Lucas/LR stepper motors, fuel pumps, coils, etc. It would also be helpful to know how many miles on truck(ex: fuel pump) and if the relays click when problems are occuring. Let me know if you get another trouble code after the TPS comes in. | ||
| Aaron Richardet (Draaronr) Senior Member Username: Draaronr Post Number: 413 Registered: 09-2002 |
Will do. 131000 miles. No relay clicks are heard, but cutting out only happens when driving. Replaced IAC with genuine, and tps will be genuine. | ||
| A. Ali (Alia176) Member Username: Alia176 Post Number: 159 Registered: 03-2003 |
Aaron, What's the latest? Just keeping the thread alive! Ali | ||
| Kyle Van Tassel (Kyle) Moderator Username: Kyle Post Number: 735 Registered: 11-2002 |
I am betting its the MAF... "Blow me" | ||
| Aaron Richardet (Draaronr) Senior Member Username: Draaronr Post Number: 420 Registered: 09-2002 |
Changed the TPS on Thursday evening. Wanted to put some miles on before I came back with an answer. Randall appears to be right. Bought the OEM TPS, and happy to say that after 100 miles all appears to be well. Back to normal acceleration, idle appears to have smoothed out and now I think I need to reset my base idle. It is running about 650-700. Thanks again, seems weird that I ohmed out the tps and checked voltage and all came to spec. Oh well so far a happy ending here. | ||
| Kyle Van Tassel (Kyle) Moderator Username: Kyle Post Number: 737 Registered: 11-2002 |
Aint that a bitch !!!!  "Blow me" | ||
| Randall Smith (Mr_smith) Member Username: Mr_smith Post Number: 233 Registered: 04-2003 |
The TPS and the MAF sensors both provide simular input to the system. But the 3AM and 5AM air flow meters rarely fail. The TPS does wear out though, creating the symptoms described. I should go by that new LR dealer in Wilmington and let them know I am the Rover God's representative in eastern NC. | ||
| Aaron Richardet (Draaronr) Senior Member Username: Draaronr Post Number: 421 Registered: 09-2002 |
They would just look at you dumbfounded as they often do, here in Wilmington. Where are you located at? | ||
| Randall Smith (Mr_smith) Member Username: Mr_smith Post Number: 236 Registered: 04-2003 |
Cary. I do a day trip to Ft Fisher at least once a year. ONSLRS usually does an overnite camping trip there every year too. | ||
| Aaron Richardet (Draaronr) Senior Member Username: Draaronr Post Number: 422 Registered: 09-2002 |
Ft. Fisher went to a pay system starting last week. $10 for a day or $40 for a season. We have some information on www.capefearrovers.com Let me know when you come to town, and I will show you a few of the local mud and water trails. | ||
| eric johnson (Eric2) Senior Member Username: Eric2 Post Number: 266 Registered: 05-2003 |
Rover God - where is the TPS on the '90 3.9? Thought the 14CU's had it, up to '89, then eliminated with the 14CUX's. | ||
| Randall Smith (Mr_smith) Member Username: Mr_smith Post Number: 237 Registered: 04-2003 |
Eric Please refer to your Manual II, section 19, page 4. The TPS is mounted to the side of the plenum chamber and is directly coupled to the throttle shaft. Begining in 1990, the Rover God provided us with a new improved TPS. It is located in the same place, but requires no adjustment(the ECU now learns the TPS position vs other inputs). All you have to do is screw it down, then pray that this will fix your hesitation. Randall | ||
| Geoff 93 RRC (Geoff) Senior Member Username: Geoff Post Number: 254 Registered: 11-2002 |
My just died finally today with a check engine light. Code 17 on the ECU readout. Symptoms were so-so idle, hesitation on take off, and lately hesitation at speed. 121,522 miles. Cheers, Geoff | ||
| Aaron Richardet (Draaronr) Senior Member Username: Draaronr Post Number: 431 Registered: 09-2002 |
TPS Geoff | ||
| Geoff 93 RRC (Geoff) Senior Member Username: Geoff Post Number: 256 Registered: 11-2002 |
Yes My ... TPS ... died. Missed that part. |
