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11-25-2020, 12:43 PM
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#1 |
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Newbie
Join Date: Sep 2020
Location: Mallorca
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goes up and down
Good afternoon, I have a Volvo 240 1991 Polar, with a SWAP from a B230ET. The car has a couple of modifications as the nose of an old model, has the lower fuel pump canceled, and a higher power inside the fuel tank. I also carry the rear axle welded so that I carry a configuration of drift type I imagine. A turbo boost and a pressure regulator with increased turbo and blowing to 0.8. The car is going very well.
The thing is that I had trouble blowing the pump fuse, then the injector relay and now, the car starts, goes up and down turns and stays up and down turns all the time ... I changed the IAC and nothing, the same ... Someone can advise me something ... thanks |
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11-25-2020, 01:41 PM
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#2 |
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Happy playing the blues
Join Date: Jun 2002
Location: S NJ, a suburb of Phila.
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It's time to do a fuel pressure check. It could be that there is an issue with the fuel pump. With the fuse to the fuel pump blowing. I'm thinking the wiring was not upgraded when a high power in tank pump was installed. You may need to upgrade the wiring to the pump and add an extra relay to handle the power the new pump needs.
__________________
Dave, 1982 242 turbo. 338k miles. MVP coilovers and 3" exhaust. Flowed 405 with a V15. Cossie turbine housing with upgraded compressor housing. 90+, IPD remote oil filter. Some other goodness, too. Been lots of fun over 25 years. Restored in 2k. Now ready for a 2nd restoration. 1993 245 Classic, 430k miles, enem V15. IPD bars and chassis braces. Simons sport exhaust from Scandix. sbabbs ezk chip. Been a good road warrior. Genuine Volvo rebuilt leaky M47. 
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11-26-2020, 04:49 AM
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#3 |
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Newbie
Join Date: Sep 2020
Location: Mallorca
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THANKS!!
Hello, I'll check all that, but I'll tell you. It has a parallel installation to the pump, if I plug it in I hear the pump, it works fine I think. But it follows that constant rise and fall of RPM. But on the normal installation, the pump doesn't sound... the relay opens and closes, but with the contact only not. I will dismantle the throttle body in case there is any leak and check the installation. The gasoline pressure regulator, I mark the rise and fall, it seems to go from 2.5 bar to almost 5 / 6 bar ... that's a lot, right? Edit: The TPS sensor when i unplugged, the car accelerate, i think it s normal... maybe its ok.. Last edited by Polar971; 11-26-2020 at 08:41 AM.. |
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11-26-2020, 06:57 PM
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#4 |
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Happy playing the blues
Join Date: Jun 2002
Location: S NJ, a suburb of Phila.
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Another thought was to check the alternator. If the output of the alternator had a problem. The voltage could rise and fall if it's not functioning correctly.
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11-27-2020, 03:37 AM
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#5 | |
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Newbie
Join Date: Sep 2020
Location: Mallorca
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Quote:
Ok, i'll check. thanks |
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11-27-2020, 01:17 PM
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#6 | |
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Newbie
Join Date: Sep 2020
Location: Mallorca
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Quote:
its like the ECU send it a emergengy cut inyection or some think... EDIT: It,s posible the fuel pump relay? i think its ECU. Last edited by Polar971; 11-29-2020 at 01:33 PM.. |
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12-07-2020, 06:50 AM
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#7 |
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Newbie
Join Date: Sep 2020
Location: Mallorca
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Ecu testesd, with another... nothing.
The car was well for a seconds, and again aceleration and cut fuel mode... (go up and down)... nobody ???nobody knows o can hel me? I have Motronic sistem, the MAF, when i desconected, the car dies... it is not normal... |
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12-08-2020, 07:52 AM
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#8 |
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Newbie
Join Date: Sep 2020
Location: Mallorca
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Hi, finally, the IAC (cis) is not working. Not voltage on middle pin... somebody knows where goes this wires? thanks
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12-08-2020, 03:48 PM
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#9 |
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Board Member
Join Date: Oct 2013
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Think its a second ground
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