chunk6379 Posted July 7, 2015 Share Posted July 7, 2015 Hi i have an issue with my Classic 99 uk2000. When i'm driving the car at about 3500-4000 revs the car bogs down and loses all of it's grunt. So far i have changed the following: Maf sensor Cam sensor Crank sensor Throttleboby Plugs and Leads Coil Pack Fuel tank and lines flushed Injectors tested and refurbished Now i am at a loss and cant figure out what else to do. Any advice would be gratefully recieved. Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted July 7, 2015 Share Posted July 7, 2015 Does it have a dump valve? Quote Link to comment Share on other sites More sharing options...
chunk6379 Posted July 7, 2015 Author Share Posted July 7, 2015 no it is standard Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted July 7, 2015 Share Posted July 7, 2015 Does the cel come on? Have you done the error code check? Quote Link to comment Share on other sites More sharing options...
chunk6379 Posted July 7, 2015 Author Share Posted July 7, 2015 I done the error code check and got a continous flash which is no stored codes if i've read it correctly. The engine light does'nt come on. Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted July 7, 2015 Share Posted July 7, 2015 What grade /type fuel do you put in it? Has it got a boost gauge if so what does it read ? As it could be fuel cut if it's over boosting. Did you change the fuel filter and how old is your fuel pump ? Maybe get the fuel pressure checked in case the fuel regulator or pump is getting tired . Could always get it on a dyno for £40 and the operator might find the fault or at least narrow it down (spark ,fuel ect) Quote Link to comment Share on other sites More sharing options...
chunk6379 Posted July 7, 2015 Author Share Posted July 7, 2015 I put Shell v-power in it high octane. There is no boost guage fitted. Forgot to put in the earlier post that i had also changed the fuel filter and pump. I have changed everything mentioned above in the last three weeks. Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted July 7, 2015 Share Posted July 7, 2015 Does it happen in straight lines or corners? Just thinking I was warned if you corner a bit strong with 1/4 tank of fuel you will get fuel surge which does feel like it hesitates for a second. Is it every gear at the same rev? Quote Link to comment Share on other sites More sharing options...
chunk6379 Posted July 7, 2015 Author Share Posted July 7, 2015 Both it only seems to happen when the car is under load as when you start the car it idles perfectly you can also take the car through the completer rev range and no coughing or spluttering as long as you are stationary. I have spoken to the local mechanic and he thinks it could be something to do with the 02 sensor. Quote Link to comment Share on other sites More sharing options...
chunk6379 Posted July 7, 2015 Author Share Posted July 7, 2015 Sorry yes every gear same rev range. Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted July 7, 2015 Share Posted July 7, 2015 Only at full throttle? 1/2 or 3/4 throttle up through the revs give you the same flat spot? Quote Link to comment Share on other sites More sharing options...
chunk6379 Posted July 7, 2015 Author Share Posted July 7, 2015 about 3/4 throttle if i drive easy through the revs the car will go it just doesnt throw you into your seat. Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted July 7, 2015 Share Posted July 7, 2015 Above 3/4 throttle with give you the bogging down but below that will rev all the way up without an issue? Quote Link to comment Share on other sites More sharing options...
chunk6379 Posted July 7, 2015 Author Share Posted July 7, 2015 pretty much yes there is a slight flat but nothing like 3/4 and above. I was thinking along the lines of overfueling. Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted July 7, 2015 Share Posted July 7, 2015 Do you get a bit of black smoke from the exhaust? Quote Link to comment Share on other sites More sharing options...
chunk6379 Posted July 7, 2015 Author Share Posted July 7, 2015 Yes and a slight smell of petrol. Just not sure what else to try. Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted July 7, 2015 Share Posted July 7, 2015 As savage said try to get on a dyno and have boost and afr monitered. Do you have any modifications and map on the car? Quote Link to comment Share on other sites More sharing options...
chunk6379 Posted July 7, 2015 Author Share Posted July 7, 2015 No car is completely standard thats one of the reasons i bought it.I'ts only done 82000 with a full subaru service history. i've only had it about 6 months and it was going great up until 3 weeks ago. Quote Link to comment Share on other sites More sharing options...
Scoobyghost Posted July 7, 2015 Share Posted July 7, 2015 Anything change just before it started to play up? Check for air leaks too. May hear a feint hissing noise. Quote Link to comment Share on other sites More sharing options...
chunk6379 Posted July 7, 2015 Author Share Posted July 7, 2015 Faulty fuel pump.put a new pump and filter on at the same time. Quote Link to comment Share on other sites More sharing options...
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