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Author: Subject: Midtec Spyder not starting TPS?
Trev Borg

posted on 8/6/18 at 05:50 PM Reply With Quote
Midtec Spyder not starting TPS?

Since I have had the midtec I have not been able to get it to run properly. It had been sat for five years and not moved before I got it

It had carbs on when I got it but had previously run on throttle bodies made from a pair of webers with a ford fuel rail. It runs a very early emerald ecu

I thought I would put the TB's back on and upload the last map that was used when running on these.

It was twin fuel tanks, now going through LP fuel filter, LP pump, swirl pot, HP pump, HP filter to fuel rail, then fuel reg swirl pot and back to tank.

Checked pumps and both run fine, pressure good at rail set to 50 psi.

Injectors firing from ecu, sparks sparking, but wont start.

I have been looking at the setting in the ecu, and there is a TPS set up. When I run the test, it only pick up two stages and say test failed. Apparently needs 7 stages.

I have had a multimeter on the tps and everything looks good. Any ideas why it would fail test and only give 2 stages?
5.3k end to end
sweep to ground 230 ohms to 5.3k
sweep to red 5.3k tp 1.116k





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owelly

posted on 8/6/18 at 08:14 PM Reply With Quote
Does the TPS give the same readings at the ECU?





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Trev Borg

posted on 8/6/18 at 09:19 PM Reply With Quote
not tested it at the ecu pins, only off the car





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rusty nuts

posted on 9/6/18 at 05:55 PM Reply With Quote
Had problems with my car when I converted to Emerald which turned out to be the TPS ,the engine would start and run but not drive . Have you tried a squirt of brake cleaner down the inlet to eliminate any furling issues? If it fires then it's likely to be stale fuel or sticking injectors, if not try new plugs.
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Trev Borg

posted on 9/6/18 at 07:52 PM Reply With Quote
Tried easy start, and nothing. I will try another TPS and see if that sorts it. If not its back to the drawing board





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rusty nuts

posted on 14/6/18 at 09:32 PM Reply With Quote
Sorry for the late reply, I've not had wifi for a few days. I suspect you may have an ignition problem if it's not firing on Easistart ? It may be as simple as fouled spark plugs if as you say you have a spark ? Have you ever had it running at all?
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Trev Borg

posted on 16/6/18 at 06:48 PM Reply With Quote
When i got the car about five years ago, it had been sat for 5 years before that. It had the throttle bodies removed and twin webbers put on. I could not get it runing very well, would not ticker over, so decided to go back to the TB's.

Unfortunately time flies by to quickly.

We have a very strong spark

We have injectors clicking and squirting.

Fuels has been drained and filled with fresh.

Lp and HP pumps checked and rail presure set to 55 PSI

Just tries two other TPS and now thats three in toatl that can not get set up. Error min position =0 max position =3. Think there needs to be 7

0 to 15 stites tho.

may have to check the wiring back to the ecu





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rusty nuts

posted on 16/6/18 at 07:39 PM Reply With Quote
What engine is it? Have you checked compression? What ECU ? Which TPS and is it fitted correctly , rotating in the correct direction?
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Trev Borg

posted on 19/6/18 at 05:15 PM Reply With Quote
engine is 2.0 inline 4 renault savanna engine, Emerald M3D, tried three TPS





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rusty nuts

posted on 19/6/18 at 06:21 PM Reply With Quote
Had problems years ago with my brothers Renault 21 which was an absolute pig to start, wouldn't idle and was gutless, I managed to cobble up a vacuum gauge and eventually got it running. The vacuum readings indicated tight valve clearances , on measuring all of them had no or very little clearance. Once adjusted by putting the shims on a sanding belt the engine started and run perfectly. I think it may have been the same engine?
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ttalps2000

posted on 19/6/18 at 08:02 PM Reply With Quote
check all the camshaft and crank timing is correct. Had similar issues in the past, cams were out 180 in the end! Luckily it was a clearance engine!
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Trev Borg

posted on 20/6/18 at 08:23 PM Reply With Quote
ignition signal is luminition





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