home register FAQ memberlist calendar

Go Back   Turbobricks Forums > Mechanical > performance & modifications

Reply
 
Thread Tools Display Modes
Old 11-25-2020, 12:43 PM   #1
Polar971
Newbie
 
Join Date: Sep 2020
Location: Mallorca
Default 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
Polar971 is offline   Reply With Quote
Old 11-25-2020, 01:41 PM   #2
dl242gt
Happy playing the blues
 
dl242gt's Avatar
 
Join Date: Jun 2002
Location: S NJ, a suburb of Phila.
Default

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.
dl242gt is offline   Reply With Quote
Old 11-26-2020, 04:49 AM   #3
Polar971
Newbie
 
Join Date: Sep 2020
Location: Mallorca
Default

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..
Polar971 is offline   Reply With Quote
Old 11-26-2020, 06:57 PM   #4
dl242gt
Happy playing the blues
 
dl242gt's Avatar
 
Join Date: Jun 2002
Location: S NJ, a suburb of Phila.
Default

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.
dl242gt is offline   Reply With Quote
Old 11-27-2020, 03:37 AM   #5
Polar971
Newbie
 
Join Date: Sep 2020
Location: Mallorca
Default

Quote:
Originally Posted by dl242gt View Post
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.

Ok, i'll check. thanks
Polar971 is offline   Reply With Quote
Old 11-27-2020, 01:17 PM   #6
Polar971
Newbie
 
Join Date: Sep 2020
Location: Mallorca
Default

Quote:
Originally Posted by dl242gt View Post
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.
Hi, checked, looks like works ok, charge almonst 14v etcc...

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..
Polar971 is offline   Reply With Quote
Old 12-07-2020, 06:50 AM   #7
Polar971
Newbie
 
Join Date: Sep 2020
Location: Mallorca
Default

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...
Polar971 is offline   Reply With Quote
Old 12-08-2020, 07:52 AM   #8
Polar971
Newbie
 
Join Date: Sep 2020
Location: Mallorca
Default

Hi, finally, the IAC (cis) is not working. Not voltage on middle pin... somebody knows where goes this wires? thanks
Polar971 is offline   Reply With Quote
Old 12-08-2020, 03:48 PM   #9
h20ham
Board Member
 
Join Date: Oct 2013
Default

Think its a second ground
h20ham is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 02:43 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.