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Jul 29, 2010 19:42:12 GMT
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Bob Cosworth... the 24v 2.9 in my scorpio has an undiagnosed problem. It went instantly from running perfectly and reliable (for almost a year in my hands) to lumpy idle, no power and nasty noises as soon (more or less) as I lent it to autofive... Well, I've been working my way through the big pile of broken cars and today I had a proper look at it. I know it isn't a snapped camchain (or valve timing generally - it is fine) - it cost me £85 in gaskets and a couple of skinned knuckles finding that out. All back together, first start in a month or so, it's exactly the same as it was. Hard to start, crappy idle and some really horrific banging noises. Changed the coil and leads. Same. New plugs... same. Tomorrow I'm going to run it for DTC's (trouble codes) and see if I can get a fuel pressure reading, there is a fair chance it is fuel related to my mind, but rather oddly it will run more or less the same with any (or all) of the leads off on the LH bank, worse with any lead off the RH and not at all with all RH leads off. Both exhausts get hot though.. the idle is so shaky it is hard to tell how many cys are firing. So.. any ideas? I have of course already read www.fordscorpio.co.uk  |
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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Jul 29, 2010 19:47:37 GMT
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Does the Cossie rail come with a Schrader valve fuel press test fitting, like the plain jane 2.9i? Can whack a gauge on it quick, and also make sure oil pressure is up to par, so to trigger the full fuel pressure, is given?
Otherwise, I think Mike is messing with you..... he'd do that merely for entertainment you know.
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 Team Blitz Ford Capri parts worldwide: Restoration, Road, or Race. Used, Repro, and NOS, ranging from scabby to perfect. Itching your Capri jones since 1979! Buy, sell, trade. www.teamblitz.com blitz@teamblitz.com |
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Jul 29, 2010 19:59:08 GMT
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Yep, usual schrader valve on the high side of the fuel rail. First thing to check tommorrow, it is I have already eliminated several common Mike-related possible causes.. he didn't put diesel in because we've been syphoning the fuel out to run other cars on, for example. |
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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Davenger
Club Retro Rides Member
It's only metal
Posts: 7,272
Club RR Member Number: 140
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What is wrong with Bob?Davenger
@dminifreak
Club Retro Rides Member 140
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Jul 29, 2010 20:03:13 GMT
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I'd inclined to say air leak with all the piping and curse word on those engines, or possibly sticky injectors
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Last Edit: Jul 29, 2010 20:03:42 GMT by Davenger
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Jul 29, 2010 20:04:41 GMT
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Cant help with diagnosis really, I doubt I know more than you do but if it turns out to be the injectors its worth replacing them with vauxhall vectra ones, they made a noticable difference to the way mine ran, smoothed out the power step you get about 3200rpm and I think it helped with fuel consumption although I had put the lump in a lighter car so can't confirm that, thats assuming the BOA and BOB ones are the same.
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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Jul 29, 2010 20:07:47 GMT
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I thought about air leaks, but given that all the vac pipes are in good condition (I checked them all when I had the top in bits) and the severity of the problem (It isn't a small misfire, lol, it's utterly undriveable and has no power) I'm looking elsewhere at the moment.
Injectors, on the list but a long way down. I find it a bit odd that they all suddenly misbehave at once....
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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Jul 29, 2010 20:19:08 GMT
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Ground between lump and chassis and ECU and battery. Always a candidate in these suddenly-flaky scenarios. Norm
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Team Blitz Ford Capri parts worldwide: Restoration, Road, or Race. Used, Repro, and NOS, ranging from scabby to perfect. Itching your Capri jones since 1979! Buy, sell, trade. www.teamblitz.com blitz@teamblitz.com |
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BiAS
Club Retro Rides Member
Insert witty comment here
Posts: 2,231
Club RR Member Number: 147
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What is wrong with Bob?BiAS
@cheeqi
Club Retro Rides Member 147
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Jul 29, 2010 20:20:34 GMT
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My only experience is with BOAs......but, the injectors are fed off an ignition switched live and then the ecu pulses the negative, on the BOAs the lives come from a splice in the engine part of the loom. On the later BOA looms I've had to bits the wire decomposes and can either short or just plain fall apart, I wonder if the BOB looms are made from the same wire?
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(car+wheels)-rideheight=WIN
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Jul 29, 2010 20:20:02 GMT
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Already checked with a jumplead from block to battery Norm. ECU earths are a little trickier to get at... I'm hoping it doesn't end like this  |
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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Jul 29, 2010 20:27:15 GMT
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Already checked with a jumplead from block to battery Norm. ECU earths are a little trickier to get at... I'm hoping it doesn't end like this Gads. Is all that needed to run a BOB? I had understood the BOA loom is a bit more separable from the main loom, whereas the BOB loom is further insinuated into the chassis harness? |
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Team Blitz Ford Capri parts worldwide: Restoration, Road, or Race. Used, Repro, and NOS, ranging from scabby to perfect. Itching your Capri jones since 1979! Buy, sell, trade. www.teamblitz.com blitz@teamblitz.com |
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Jul 29, 2010 20:38:10 GMT
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No Norm, that's just what a granada looks like by the time you have easy access to the ECU and wiring. It's in a sod of a place. Pic shows everything that isn't the engine loom. And no, the BOB cars follow the same pattern as the earlier ones, the engine loom is separate from the rest, as is the ABS loom and the "ultima" electrics pack, and the stereo loom etc. It is all modular. Matt, yeah wiring damage is a common one on BOB as well, especially the bit that runs up the inlet valley  That, again, was checked while I had the top in bits. |
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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10mpg
Club Retro Rides Member
Posts: 4,253
Club RR Member Number: 204
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What is wrong with Bob?10mpg
@10mpg
Club Retro Rides Member 204
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Jul 29, 2010 22:04:07 GMT
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My money would be on a crank or possibly cam sensor
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Last Edit: Jul 29, 2010 22:03:12 GMT by 10mpg
The Internet, like all tools, if used improperly, can make a complete bo**cks of even the simplest jobs...
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Jul 29, 2010 22:09:32 GMT
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Crank and cam sensor faults on these normally lead to "hell no I won't go"... and they are both hard to get at! Still, if fuel pressure checks out OK tomorrow and DTC doesn't show anything, I'll be changing them (and the CT and AAT sensors, checking the TPS and swapping the MAF for the spare)
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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Does sound very air leak related. Then again I'm useless  |
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CDI/computer problems? that could just die out of the blue. That's what it sounds like if you can remove half the leads and it still runs more or less crappy, even though you've changed out the plugs and leads. Do you have one of those light up spark plug testers? See if you have good consistent spark to all the plugs at the right times.
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Jul 30, 2010 16:57:11 GMT
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OK, todays update so far... hand-held scan tools don't like the "almost OBD2 but not quite" scorpio and the fuel pressure gauge is currently AWOL I've come home to get the eeepc (I know I can read it with that!) One thing I did notice though, there is no residual pressure at all in the fuel rail once you stop the engine. There should be some (even if I can't measure it) so current "I think it might be that" list is as follows 1 Fuel pressure regulator is jammed open 2 Pressure pump has a hole in it (returning pressure to tank) 3 one or more injectors are stuck open |
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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Jul 30, 2010 17:07:09 GMT
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Remind me again why they stopped making cars with carburettors?
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Davenger
Club Retro Rides Member
It's only metal
Posts: 7,272
Club RR Member Number: 140
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What is wrong with Bob?Davenger
@dminifreak
Club Retro Rides Member 140
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Jul 30, 2010 17:16:34 GMT
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Aparrently injection is more efficient and reliable
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Jul 30, 2010 17:34:49 GMT
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^^ It is find me a carburettor car that has done 130,000 miles on the original carb.... |
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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Jul 30, 2010 18:20:44 GMT
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most people didn't know how carbs worked anyway, so not knowing whats gone wrong with your fuel system is nothing new, at least you get fault codes these days instead of your mate coming round with his big screw driver turning screws until your car wont run at all.
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Volvo back as my main squeeze, more boost and some interior goodies on the way.
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That, again, was checked while I had the top in bits.
