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Wes

97 V8 Engine Trouble

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After a long absence, I'm seeking some needed help. After a year of zero problems I got the car out for a show, it started but sounded like it was missing, ran rough and had to feather the throttle to keep it at idle. Seemed better in 2nd and 3rd, Drove around the block to warm it up but didn't improve, by the time I made the round and got home it quit altogether and hasn't started since. Fuel pump comes on with the ignition and the engine turns over but will not start. Just bought a code reader but haven't had a chance to check it yet. If any you have any ideas I'd love to hear from you. I'm 8 hrs away from the nearest Lotus service, so doing my best to narrow this down before I make the trip. Thanks in advance.

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Peter,

Thanks for the reply, I hope to put the code reader on tonight, and I'll let you know what it throws. the check engine comes on normally when you are cranking but since it never starts it just stays on. I'm really a newbie when it comes to this car I have two American Muscle cars that I can work on, but this beast is a little intimidating. I'll let you know. Thanks again. Wes

Peter,

I put the OBDII reader on the plug in the rear boot, and got a whopping 5 codes. P0100, P0110, P0115, P0120 and a P1600,

Where do I start with this mess? Wes

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Wes,

Strange codes indeed! Are you sure the codes came from a Lotus V8 Esprit? If you read below you'll see why I made this comment.

P0100 Mass or Volume Air Flow Circuit Malfunction (Not listed in Lotus V8 manual)

P0110 Intake Air Temperature circuit (Not listed in Lotus V8 manual)

P0115 Engine Coolant Temperature Circuit Malfunction (Not listed in Lotus V8 manual)

P0120 Throttle Position Sensor/Switch A Circuit Malfunction (Not listed in Lotus V8 manual)

P1600 ECU BATT Malfunction (Not listed in Lotus V8 manual)

Based on these codes, all not documented in the Lotus Service Notes, I'd contact Lotus Technical support and ask them for their opinion.

If I was having to fix this without the benefit of Lotus Technical support. I would start by resetting the ECU by either disconnecting the car battery for 20 min (make sure you know your radio code before doing this) or removing fuse B2 in the "Rear Relay Station & Fusebox 'B'" for 20 min. If the problem still persists then I'd suspect a bad ECU.

Very strange. Please let us know how you get on with this issue.

Regards,

Peter.

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Thanks for the ideas,

Worked with the OBD II reader last night and I think it's not even talking with the ECM, It give me a link error then displays the codes so they may be some kind of default. I didn't notice the error before. I'm debating pulling power to the ECM and seeing if it resets, but worry about the "stereo code", I've changed batteries in the car once and didn't have an issue, but have read posts that indicate you should have this code before leaving it off for any period of time. I don't have the key fob or any other alarms that I know of. Thanks for the help.

Wes

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Peter,

That makes perfect sense, not sure why I didn't think of that :)

Thanks

Wes

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Gav,

I'm actually in Cody, just outside the east entrance to Yellowstone, which about 8 hrs from Rapid City. You are correct. Ferrari of Denver is the closest Lotus service which is where it seems to be headed. I pulled the ECU fuse last night and still can't get the OBD reader to communicate. I'll keep looking though,

Wes

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I pulled the ECU fuse last night and still can't get the OBD reader to communicate.

Wes,

You need the key in the ignition and turned on (ready to start) before the ECU will talk to the OBD reader. Have you set the OBD protocol to ISO? The Esprit V8 ECU will not support the CAN bus version of OBD.

After the ECU reset, have you started the car? If yes, did it have the same symptoms as before?

Regards,

Peter.

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Peter,

I'm using an Innova OBD2 reader, which is a can buss reader, so that might be a problem. there isn't a setting that allows me to change the protocol so could be an additional issue.

I did have the key on when I attempted the read but each time I get "error" in the reader.

The fuse didn't make any difference, When the key is first turned on the Check engine light is lit solid, have a few seconds of cranking it goes out. the engine sounds fine when turning over, and fuel pump sounds like it pressurizes okay. I've checked the inertia switch as well. I'll check and see if I can find a different reader here. We're in such a small town, selection is pretty light.

Thanks for the response.

Wes

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can you post an 'log'-protocol , so that we can see what your interface is doing on 'startup-connection reading' !? In other words, is it an "CAN-bus only" , or an multifunctional interface ?


*********************************************************************

to name the things if I see them, that's what I call integrity..

*********************************************************************

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"...Links to all OBD2 protocols including CAN to decode


*********************************************************************

to name the things if I see them, that's what I call integrity..

*********************************************************************

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Wes,

The Esprit V8 does not have or support a CAN bus interface. It uses the older ISO protocol. If you search on Ebay there are a few cheap ELM 323 ($25) readers that connect to a PC via RS232 or USB and together with some free software enable the connection to the vehicle.

Regards,

Peter.

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Wes, you have an simple code reader-so there might no log to read. It's an handheld , no use of an notebook screen. But it should do the basic stuff: read & erase codes if you follow the instructions strictly


*********************************************************************

to name the things if I see them, that's what I call integrity..

*********************************************************************

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Sorry, just read the readers manual and it does claim to be able to use ISO 9142-2, J-1850 (VPM & PWM). My mistake.

Wes,

Have you tried both the OBD connectors? The one in the boot and the one on under the glove box? I always use the glove box one, but both should work.

Regards,

Peter.

Edited by peter_england99

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That's what I'd hoped anyway,

but plugged in it gives me and "error" everytime. Thanks for the followup.

Wes

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Hmmm..... so if you have followed the users manual of that reader, than i think it is time to contact the warranty department of the seller from that tool !?

We have some different code-reader/ data scanner in use in the forum. Some a bit faster, some need other optional setting - but all work with that ISO 9142 protocol. As both ports failed -there must be something wrong with your settings, or the interface has an fault... .


*********************************************************************

to name the things if I see them, that's what I call integrity..

*********************************************************************

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From what I know, some OBD II scanners in the US can't communicate with the Esprit. Wes if you have an "Autozone" near you then you can rent one from your local Autozone. They will work with your Esprit. If you want to purchase one that works then send me a PM. Hope that helps.

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Thanks all for the help.

I've sold the code reader to a friend that needed one anyway. So that saved me there. I'll check out the Autozone idea, might be a cheaper and easier way than getting one the shops to come out and take a look see. Beyond that it's an 8 hr drive to Denver. Wes

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