The history on my (new to me) '89 740FT is 119,000, and a clogged PVC system.

So I removed all of the intake system from the airbox to the turbo and from the intercooler to the block (that is, I removed the intake manifold.

Put all back together and the engine ran fine for abot 20-30 minutes before I shut it down.

New intake manifold gasket; cleaned the injectors and installed new seals; cleaned & adjusted the throttle body and used new gasket; cleaned the PVC system; Inspected hoses and wiring =OK; cleaned grounds; Looked at FPR for any gas leakage on vacuum side = "NO"; checked all coil and distributor wires sof tightness; regapped plugs; etc.

Now it won't re-start.

Cranks well. Acts like it's getting no gas, or there is a massive vacuum leak (like a big hose off somewhere = Not). Will *almost* start once, or when I shoot in some carb cleaner. Tach does bounce while cranking.

Pulled and inspected the FI relay. Looks OK. Jumped pins 30 and 87/2 and have both pumps running.

So, now what?
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1989 740Ti 1986 240DL 1984 244GL

Hi, Zee!

Two stupid ideas:

-- spark plug wires connected in right order? I know the 700 uses a different distributor layout from the 240, and I'm not sure if it's even possible to interchange the wires on a 700, but...

-- 25 amp fuse? Does a 700 even have one of these? The reason I'm mentioning this is I did nearly the same thorough tuneup on my then-new '87 240, and I tried to fire it up and there was a no-start. In a fit of desparation, I swapped the 25 amp fuse and wouldn't you know, it fired right up. Why a tune up performed no closer than 18 inches from this fuse would have induced fuse failure is beyond me, but there you go.

Rob Kuhlman

Hello, Rob! hope you had a great holiday.

>"Two stupid ideas"

Good ideas always to think about the simplest of things which usually kill the engine or prevent start up; however,

"-- spark plug wires connected in right order?"

Yeah, I only pulled and adjusted one plug at a time

"-- 25 amp fuse? Does a 700 even have one of these?"

I found a 20 amp inn front of the right headlight. Don't yet know what is is, but it was good.
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1989 740Ti 1986 240DL 1984 244GL

There is no engine compartment fuse on the 700 series.

Check the plug wires and all electrical connectors including ground strap to engine electrics. Are the injectors firing at all? If not, suspect the FI relay.

Will re-check the electricals, sure.

How do I check to see if the injectors are firing? Unclip them, pull them out while attatched to the rail and point them into four little bottles while cranking?

Meanwhile, I'll put this FI relay into my '86 240 and see what happens. Looks like the same one.
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1989 740Ti 1986 240DL 1984 244GL