Subaru Impreza Forum - WRX STI Rally Performance Tuning

Subaru Impreza Forum - WRX STI Rally Performance Tuning (http://www.subaru-impreza.org/forum/)
-   Subaru Impreza Discussions (http://www.subaru-impreza.org/forum/subaru-impreza-discussions/)
-   -   Engine idle/stalling problem? (http://www.subaru-impreza.org/forum/subaru-impreza-discussions/66472-engine-idle-stalling-problem.html)

sandman666 27 Apr 2009 09:33 AM

Engine idle/stalling problem?
 
Hi Fellas...I picked up my 1998 wrx wagon yesterday and the guy told me it needs a new battery as the engine rpm will drop really low and sometimes cut out.This seems to happen when pulling up at lights and putting the car in nuetral or after a journey and pulling up outside my house.Car seems to run great apart from this,could it be the battery or have i been told this to maybe cover up something serious.:confused::(

rikimaru 27 Apr 2009 10:27 AM

Re: Engine idle/stalling problem?
 
Sounds like the MAF sensor to me mate. Classic symptoms. I really doubt it is your battery.

jd 27 Apr 2009 12:00 PM

Re: Engine idle/stalling problem?
 
dont rule out the Idle Control Valve.

sandman666 27 Apr 2009 12:15 PM

Re: Engine idle/stalling problem?
 
If it is the MAF,can i clean it with some electrical contact cleaner or throttle body type cleaner,and would a decent mechanic be able to tell what it is..Thanks Guys.

rikimaru 27 Apr 2009 12:44 PM

Re: Engine idle/stalling problem?
 
You can clean it (can even get stuff specifically for that purpose) but wether it will do any good I don't know. Worth go though i guess.

First thing I would do is check for fault codes by connecting the black connectors under the dash (drivers side). Fault code for MAF is 23. 2nd thing you can do is, with the car running, unplug the MAF. If car stops MAF is fine (in theory. I'll get to that in a mo), if engine keeps running MAF is knackered.

However, when my MAF went got no fault code and engine stopped straight away when MAF was unplugged. Had to swap with a working MAF to confirm that was the problem.

sandman666 27 Apr 2009 02:25 PM

Re: Engine idle/stalling problem?
 
THANKS Rikimaru...just come back from driving it and noticed the rpm goes up as well as down when engine is idle,it went right up to nearly 2000 rpm and then down again so it seems to be fluctuating both ways,does this mean anything to you,or does this sound like the same problem(MAF related)..your help is much appreciated mate..THANKS.;)

Quote:

Originally Posted by rikimaru (Post 319346)
You can clean it (can even get stuff specifically for that purpose) but wether it will do any good I don't know. Worth go though i guess.

First thing I would do is check for fault codes by connecting the black connectors under the dash (drivers side). Fault code for MAF is 23. 2nd thing you can do is, with the car running, unplug the MAF. If car stops MAF is fine (in theory. I'll get to that in a mo), if engine keeps running MAF is knackered.

However, when my MAF went got no fault code and engine stopped straight away when MAF was unplugged. Had to swap with a working MAF to confirm that was the problem.


rikimaru 27 Apr 2009 10:19 PM

Re: Engine idle/stalling problem?
 
Yes, my idle was all over the place at idle, up and as you say all the way down and stalling. Idle surge is also a symptom of a dodgy Idle Control Valve though as JD said so worth checking out. Have you tried checking the fault codes?

sandman666 28 Apr 2009 11:37 AM

Re: Engine idle/stalling problem?
 
Quote:

Originally Posted by rikimaru (Post 319447)
Yes, my idle was all over the place at idle, up and as you say all the way down and stalling. Idle surge is also a symptom of a dodgy Idle Control Valve though as JD said so worth checking out. Have you tried checking the fault codes?

Will try the fault code connectors and see what comes back, i`ll let you know what it says a.s.a.p,thanks mate for helping me with this.;)

stiimpreza1984 28 Apr 2009 05:22 PM

Re: Engine idle/stalling problem?
 
Quote:

Originally Posted by sandman666 (Post 319524)
Will try the fault code connectors and see what comes back, i`ll let you know what it says a.s.a.p,thanks mate for helping me with this.;)

Scoobypedia | Trusted knowledge for everything Subaru | Knowledge / Subaru Specific Trouble Code Definitions heres the codes;)

sandman666 28 Apr 2009 07:30 PM

Re: Engine idle/stalling problem?
 
Cant seem to find the fault connectors under the dash,have looked under the bottom of the steering colum,is this where i should be looking,and what do they look like?sorry for sounding thick,but these cars are totally new to me.

stiimpreza1984 30 Apr 2009 08:08 PM

Re: Engine idle/stalling problem?
 
Quote:

Originally Posted by sandman666 (Post 319634)
Cant seem to find the fault connectors under the dash,have looked under the bottom of the steering colum,is this where i should be looking,and what do they look like?sorry for sounding thick,but these cars are totally new to me.

Yours is a classic scoob ya? these connectors are not in New age scoobshttp://www.subaru-impreza.org/forum/...c-impreza.html:)

sandman666 01 May 2009 10:46 AM

Re: Engine idle/stalling problem?
 
Quote:

Originally Posted by stiimpreza1984 (Post 320006)
Yours is a classic scoob ya? these connectors are not in New age scoobshttp://www.subaru-impreza.org/forum/...c-impreza.html:)

Thanks for the heads up buddy.:)

hanzo 01 May 2009 01:10 PM

Re: Engine idle/stalling problem?
 
is the car running an aftermarket vta dumpvalve? this can in some cases cause erratic idling issues just a thought and a cheap fix .

sandman666 02 May 2009 08:39 AM

Re: Engine idle/stalling problem?
 
Quote:

Originally Posted by hanzo (Post 320130)
is the car running an aftermarket vta dumpvalve? this can in some cases cause erratic idling issues just a thought and a cheap fix .

Yes mate it has a Huge twin trumpet blitz dump valve on it,if this helps.i Tried taking the maf sensor off yesterday while the car was running,the engine changed its idle speed but did not stop all together.going to fit a new K&N panel filter in today also,dont think it will cure the problem but may help it breathe better.This is getting to be a real pain now as the car has cut out on me a few times and once i couldnt start it again for a few minutes,luckily i was in a car park at the time,but i could have been sat in traffic so i need to sort this A.S.A.P:(:confused:

RAianM 02 May 2009 02:47 PM

Re: Engine idle/stalling problem?
 
Sounds like the Maf to me. Sounds similar to a mates prob.


All times are GMT. The time now is 04:36 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177