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Car Probs
P Plater
19 Posts
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 Posted - 25 Oct 2006 : 11:02:10 AM
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Hi ive got a Vn 1989 Toyota Lexcen, when started it idles at 2000 then slowly dies anyone know what might be the problem?? gonna replace fuel pump is that my prob??
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mouce
National Driver
1525 Posts
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Posted - 25 Oct 2006 : 11:33:45 AM
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Welcome to the club, hope to see you asking and answering lots of questions.
If it was the fuel pump I'd be inclined to say that it wouldn't start OR idle, let alone idle fast. When the fuel pump dies it dies completely and it won't pump any fuel, so the car will struggle to run at all.
A fast idle like that would suggest to me that there is an air leak somewhere. Check the condition of all of the black hoses coming out of the throttle body. If you feel like getting a bit more adventurous check out the condition of the gaskets at the throttle body and at the intake elbow (where the elbow meets the inlet manifold).
First up though, I'd try cleaning/adjusting the throttle body and IACV (here's a guide): http://www.vncommodore.com/forum/topic.asp?TOPIC_ID=394
The other possibility is that your battery is well and truely on the way out. If the battery is dead and cannot hold charge properly (it might only just have enough to start the car for instance) then the Alternator is going to work overtime getting it back up to the correct charge level. The ECU in the VN monitors the voltage and will increase engine speed to charge the battery more quickly. At idle the alternator only supplies 14A, if it needs more and you're sitting still then it's going to increase the engine speed as it requires. When my battery was dying, it used to idle at about 1200rpm to keep enough charge flowing.
Another possibility is that the ECU needs to be reset (which it will when you clean the t/b) (here's a guide): http://www.vncommodore.com/forum/topic.asp?TOPIC_ID=413
If I think of anything else I'll let you know. |
Bite off more than you can chew, and chew like hell - Peter Brock (1945-2006) |
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Car Probs
P Plater
19 Posts
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Posted - 25 Oct 2006 : 11:41:30 AM
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| Thanks mouce but ive already had the elbow off nothing there maybe the Fuel Pressure Regulator?? Or M.A.P??? As for the battery it was brand new only been in the car 2 years. |
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mouce
National Driver
1525 Posts
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Posted - 25 Oct 2006 : 12:25:24 PM
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I still say clean and check your t/b and IACV.
Batteries don't always last years and years and years. Mine has only been in for 15 months and already I'm seeing signs that it's on the way out.
If the MAP was on the way out, I'd be inclined to say that the idle wouldn't settle down after a while. It would stay high, and not taper down.
There's a chance that it's the pressure regulator. But I wouldn't have thought that it's highly likely. Go with the t/b and IACV for now. |
Bite off more than you can chew, and chew like hell - Peter Brock (1945-2006) |
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Joogie
Fully Licenced
291 Posts
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Posted - 25 Oct 2006 : 2:05:30 PM
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| I dont know if this will help but i had problems on the weekend with my vn, it would idle but not rev, first thought was map sensor and that was replaced and made no differance. Then tried fuel pumps which was another obvious thing and the reason it idles was because low pressure pump was still working but the high pressure had packed it in, therefore it had enough fuel to idle but not drive. Glad i had RAC... |
Boost me, and double clutch me so i can get my. Loss of Traction! |
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trizo
Forum Moderator
3091 Posts
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Posted - 25 Oct 2006 : 7:18:10 PM
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ok this happened 2 me and mouce is on the money with the map sensor wen faulty or not put bak 2gether properly they will idle nice 4 about 15 secs then your exauhst will fart and make noises then your idle will die .... and a battery will cause u grief if flat!!
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3 can keep a secret if 2 are dead |
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Car Probs
P Plater
19 Posts
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Posted - 26 Oct 2006 : 10:10:59 AM
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Thanks everyone to all your input but my motor threw a piston through the 6th spark plug and i now have to put
a VP series 2 motor in it Thank you all again |
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mouce
National Driver
1525 Posts
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Posted - 26 Oct 2006 : 10:16:48 AM
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| DAMN! How the hell did that happen? Sounds like there was more wrong with that motor than just a suspect MAP sensor. |
Bite off more than you can chew, and chew like hell - Peter Brock (1945-2006) |
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Car Probs
P Plater
19 Posts
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Posted - 26 Oct 2006 : 10:23:14 AM
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| Not sure its 1989 Vn series 1 its been great for the 2 +1/2 years weve had it just had to change the coil pack last year as it still had the ridgy didge one in it still.Then Friday my husband was driving it home from town and the motor just stopped he luckily got it home doing 40km phr. Lucky we have the 95 Vs we brought 4 months ago!!! Thanks again for all the help provided. |
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